diff --git a/index.js b/index.js
index bdafe4c8b..9d8efdc1b 100644
--- a/index.js
+++ b/index.js
@@ -35,8 +35,8 @@ function addNumbers(num1, num2) {
  * the returned value should look like: 'Goodbye, Andy. Have a great day.'
  * 
 */
-function sayGoodbye(/* code here */) {
-  /* code here */
+function sayGoodbye(name) {
+  return 'Goodbye, ' + name + '.' + ' Have a great day.';
 }
 
 /**
@@ -53,8 +53,8 @@ function sayGoodbye(/* code here */) {
  * Hint 1: The formula for converting celsius to fahrenheit is t*9/5 + 32 where t is the temperature in celsius.
  * Hint 2: There is a very easy way to round numbers in JS. Do a google search to find out how. 
 */
-function temperatureCtoF(/* code here */) {
-  /* code here */
+function temperatureCtoF(degrees) {
+  return Math.round(degrees * (9/5) + 32);
 }
 
 /**
@@ -74,8 +74,12 @@ function temperatureCtoF(/* code here */) {
  * 
  * Hint: You can call your `temperatureCtoF` function from inside `temperatureInF`.
 */
-function temperatureInF(/* code here */) {
-  /* code here */
+function temperatureInF(degrees, unit) {
+  if (unit === 'F') {
+    return Math.round(degrees) + unit;
+  } else {
+     return temperatureCtoF(degrees) + 'F';
+  }
 }
 
 
@@ -95,8 +99,12 @@ function temperatureInF(/* code here */) {
  *   email: "leia@leia.com",
  * }
 */
-function makePersonObject(/* code here */) {
-  /* code here */
+function makePersonObject(id, name, email) {
+  let person = new Object();
+    person.id = id;
+    person.name = name;
+    person.email = email;
+  return person; 
 }
 
 /**
@@ -112,8 +120,8 @@ function makePersonObject(/* code here */) {
  * passing { id: 1, name: 'Leia', email: 'leia@leia.com` } as the argument,
  * the returned value should look like `Hello, my name is Leia`.
 */
-function getName(/* code here */) {
-  /* code here */
+function getName(person) {
+  return 'Hello, my name is ' + person.name + '.' ;
 }
 
 
@@ -132,8 +140,9 @@ function getName(/* code here */) {
  * passing in [ 'orange', 'grape', 'apple', 'banana', 'mango' ] as the argument,
  * the returned value should be: 2.
 */
-function appleIndex(/* code here */) {
-  /* code here */
+function appleIndex(fruits) {
+  const applePosition = fruits.indexOf('apple');
+  return applePosition;
 }
 
 /**
@@ -151,10 +160,19 @@ function appleIndex(/* code here */) {
  * passing in [ 'orange', 'apple', 'banana', 'apples', 'apple', 'mango' ] as the argument,
  * the returned value should be: [ false, true, false, false, true, false ].
 */
-function isItAnApple(/* code here */) {
-  /* code here */
-}
 
+function isItAnApple(fruits) {
+  var appleList = [];
+
+  for (let i = 0; i < fruits.length; i++){
+    if (fruits[i] === 'apple'){
+      appleList.push(true);
+    } else {
+      appleList.push(false);
+      }
+    } return appleList;
+  }
+  
 
 
 /*
@@ -210,7 +228,8 @@ function get3rdCar(inventory) {
  * it will return `This is a Lincoln Navigator`.
 */
 function getCarInfoByIndex(inventory, index) {
-  /* code here */
+  var makeModel = inventory[index];
+  return `This is a ${makeModel.car_make} ${makeModel.car_model}.`
 }
 
 /**
@@ -224,8 +243,10 @@ function getCarInfoByIndex(inventory, index) {
  * For example, if getLastCarInfo is invoked passing the inventory inside /data/inventory.js,
  * it will return `This is a Lincoln Town Car`.
 */
-function getLastCarInfo(/* code here */) {
-  /* code here */
+function getLastCarInfo(inventory) {
+  var inventoryLength = ((inventory.length) -1);
+  var lastCar = inventory[inventoryLength];
+  return `This is a ${lastCar.car_make} ${lastCar.car_model}.`
 }
 
 /**
@@ -237,8 +258,14 @@ function getLastCarInfo(/* code here */) {
  *     (1) an array which is an inventory of cars like the one inside /data/inventory.js.
  * getModelYears returns an array containing all the 'car_year's in the inventory.
 */
-function getModelYears(/* code here */) {
-  /* code here */
+function getModelYears(inventory) {
+  var carAge = [];
+  
+  for (let i = 0; i <inventory.length; i++){
+    var carInfo = Object.values(inventory[i])
+    carAge.push(carInfo[3]);
+  } return carAge;
+
 }
 
 /**
@@ -251,12 +278,15 @@ function getModelYears(/* code here */) {
  *     (1) an array which is an inventory of cars like the one inside /data/inventory.js.
  *     (2) a number which is the desired car id (see how each car has its own unique id).
  * getCarInfoById returns a string in the format `This is a {car_make} {car_model}
- * 
+ *
  * For example, if getCarInfoById is invoked with the inventory and the number 1,
  * it will return `This is a Lincoln Navigator`.
 */
-function getCarInfoById(/* code here */) {
-  /* code here */
+function getCarInfoById(inventory, id) {
+  var carNumber = (id - 1)
+  var selectedIndex = inventory[carNumber];
+  return `This is a ${selectedIndex.car_make} ${selectedIndex.car_model}`;
+
 }
 
 /**
@@ -273,8 +303,15 @@ function getCarInfoById(/* code here */) {
  * with a `car_year` which is at most the given desired max year,
  * in the same order as they appear in the original inventory.
 */
-function getOlderCars(/* code here */) {
-  /* code here */
+function getOlderCars(inventory, age) {
+  var carAges = [];
+  
+  for (let i = 0; i < inventory.length; i++){
+    var carInfo = Object.values(inventory[i]);
+    if (carInfo[3] <= age){
+     carAges.push(inventory[i]); 
+    } 
+  }return carAges;
 }
 
 /**
@@ -290,8 +327,27 @@ function getOlderCars(/* code here */) {
  * made by either `Audi` or `Mercedes-Benz` or `Volkswagen` or `BMW`,
  * in the same order as they appear in the original inventory.
 */
-function getGermanCars(/* code here */) {
-  /* code here */
+function getGermanCars(inventory) {
+  var imports = [];
+  
+  for (let i = 0; i < inventory.length; i++){
+    var carInfo = Object.values(inventory[i]);
+    if (carInfo[1] === 'Audi'){
+     imports.push(inventory[i]); 
+    }
+    else
+      if (carInfo[1] === 'Mercedes-Benz'){
+      imports.push(inventory[i]); 
+     }
+     else
+      if (carInfo[1] === 'Volkswagen'){
+     imports.push(inventory[i]); 
+    }
+    else
+      if (carInfo[1] === 'BMW'){
+   imports.push(inventory[i]); 
+  }
+  }return imports;
 }
 
 /**
@@ -307,8 +363,10 @@ function getGermanCars(/* code here */) {
  *         (1) causes the odometer in the object to be increased by the distance,
  *         (2) returns the updated value of the `odometer`.
 */
-function carMaker(/* code here */) {
-  /* code here */
+function carMaker(miles) {
+  let car = new Object()
+  car.odometer = miles;
+  return car;
 }
 
 /// ////// END OF CHALLENGE /////////
diff --git a/package-lock.json b/package-lock.json
index f3c02e373..44f6abac8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -35,9 +35,9 @@
       }
     },
     "acorn": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.0.tgz",
-      "integrity": "sha512-kL5CuoXA/dgxlBbVrflsflzQ3PAas7RYZB52NOm/6839iVYJgKMJ3cQJD+t2i5+qFa8h3MDpEOJiS64E8JLnSQ==",
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+      "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
       "dev": true
     },
     "acorn-jsx": {
@@ -1706,14 +1706,13 @@
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8="
     },
     "fsevents": {
-      "version": "1.2.9",
-      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.2.9.tgz",
-      "integrity": "sha512-oeyj2H3EjjonWcFjD5NvZNE9Rqe4UW+nQBU2HNeKw0koVLEFIhtyETyAakeAM3de7Z/SW5kcA+fZUait9EApnw==",
+      "version": "1.2.12",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.2.12.tgz",
+      "integrity": "sha512-Ggd/Ktt7E7I8pxZRbGIs7vwqAPscSESMrCSkx2FtWeqmheJgCo2R74fTsZFCifr0VTPwqRpPv17+6b8Zp7th0Q==",
       "dev": true,
       "optional": true,
       "requires": {
-        "nan": "^2.12.1",
-        "node-pre-gyp": "^0.12.0"
+        "node-pre-gyp": "*"
       },
       "dependencies": {
         "abbrev": {
@@ -1761,7 +1760,7 @@
           }
         },
         "chownr": {
-          "version": "1.1.1",
+          "version": "1.1.4",
           "bundled": true,
           "dev": true,
           "optional": true
@@ -1791,7 +1790,7 @@
           "optional": true
         },
         "debug": {
-          "version": "4.1.1",
+          "version": "3.2.6",
           "bundled": true,
           "dev": true,
           "optional": true,
@@ -1818,12 +1817,12 @@
           "optional": true
         },
         "fs-minipass": {
-          "version": "1.2.5",
+          "version": "1.2.7",
           "bundled": true,
           "dev": true,
           "optional": true,
           "requires": {
-            "minipass": "^2.2.1"
+            "minipass": "^2.6.0"
           }
         },
         "fs.realpath": {
@@ -1849,7 +1848,7 @@
           }
         },
         "glob": {
-          "version": "7.1.3",
+          "version": "7.1.6",
           "bundled": true,
           "dev": true,
           "optional": true,
@@ -1878,7 +1877,7 @@
           }
         },
         "ignore-walk": {
-          "version": "3.0.1",
+          "version": "3.0.3",
           "bundled": true,
           "dev": true,
           "optional": true,
@@ -1897,7 +1896,7 @@
           }
         },
         "inherits": {
-          "version": "2.0.3",
+          "version": "2.0.4",
           "bundled": true,
           "dev": true,
           "optional": true
@@ -1933,13 +1932,13 @@
           }
         },
         "minimist": {
-          "version": "0.0.8",
+          "version": "1.2.5",
           "bundled": true,
           "dev": true,
           "optional": true
         },
         "minipass": {
-          "version": "2.3.5",
+          "version": "2.9.0",
           "bundled": true,
           "dev": true,
           "optional": true,
@@ -1949,42 +1948,42 @@
           }
         },
         "minizlib": {
-          "version": "1.2.1",
+          "version": "1.3.3",
           "bundled": true,
           "dev": true,
           "optional": true,
           "requires": {
-            "minipass": "^2.2.1"
+            "minipass": "^2.9.0"
           }
         },
         "mkdirp": {
-          "version": "0.5.1",
+          "version": "0.5.3",
           "bundled": true,
           "dev": true,
           "optional": true,
           "requires": {
-            "minimist": "0.0.8"
+            "minimist": "^1.2.5"
           }
         },
         "ms": {
-          "version": "2.1.1",
+          "version": "2.1.2",
           "bundled": true,
           "dev": true,
           "optional": true
         },
         "needle": {
-          "version": "2.3.0",
+          "version": "2.3.3",
           "bundled": true,
           "dev": true,
           "optional": true,
           "requires": {
-            "debug": "^4.1.0",
+            "debug": "^3.2.6",
             "iconv-lite": "^0.4.4",
             "sax": "^1.2.4"
           }
         },
         "node-pre-gyp": {
-          "version": "0.12.0",
+          "version": "0.14.0",
           "bundled": true,
           "dev": true,
           "optional": true,
@@ -1998,11 +1997,11 @@
             "rc": "^1.2.7",
             "rimraf": "^2.6.1",
             "semver": "^5.3.0",
-            "tar": "^4"
+            "tar": "^4.4.2"
           }
         },
         "nopt": {
-          "version": "4.0.1",
+          "version": "4.0.3",
           "bundled": true,
           "dev": true,
           "optional": true,
@@ -2012,19 +2011,29 @@
           }
         },
         "npm-bundled": {
-          "version": "1.0.6",
+          "version": "1.1.1",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "npm-normalize-package-bin": "^1.0.1"
+          }
+        },
+        "npm-normalize-package-bin": {
+          "version": "1.0.1",
           "bundled": true,
           "dev": true,
           "optional": true
         },
         "npm-packlist": {
-          "version": "1.4.1",
+          "version": "1.4.8",
           "bundled": true,
           "dev": true,
           "optional": true,
           "requires": {
             "ignore-walk": "^3.0.1",
-            "npm-bundled": "^1.0.1"
+            "npm-bundled": "^1.0.1",
+            "npm-normalize-package-bin": "^1.0.1"
           }
         },
         "npmlog": {
@@ -2089,7 +2098,7 @@
           "optional": true
         },
         "process-nextick-args": {
-          "version": "2.0.0",
+          "version": "2.0.1",
           "bundled": true,
           "dev": true,
           "optional": true
@@ -2104,18 +2113,10 @@
             "ini": "~1.3.0",
             "minimist": "^1.2.0",
             "strip-json-comments": "~2.0.1"
-          },
-          "dependencies": {
-            "minimist": {
-              "version": "1.2.0",
-              "bundled": true,
-              "dev": true,
-              "optional": true
-            }
           }
         },
         "readable-stream": {
-          "version": "2.3.6",
+          "version": "2.3.7",
           "bundled": true,
           "dev": true,
           "optional": true,
@@ -2130,7 +2131,7 @@
           }
         },
         "rimraf": {
-          "version": "2.6.3",
+          "version": "2.7.1",
           "bundled": true,
           "dev": true,
           "optional": true,
@@ -2157,7 +2158,7 @@
           "optional": true
         },
         "semver": {
-          "version": "5.7.0",
+          "version": "5.7.1",
           "bundled": true,
           "dev": true,
           "optional": true
@@ -2210,18 +2211,18 @@
           "optional": true
         },
         "tar": {
-          "version": "4.4.8",
+          "version": "4.4.13",
           "bundled": true,
           "dev": true,
           "optional": true,
           "requires": {
             "chownr": "^1.1.1",
             "fs-minipass": "^1.2.5",
-            "minipass": "^2.3.4",
-            "minizlib": "^1.1.1",
+            "minipass": "^2.8.6",
+            "minizlib": "^1.2.1",
             "mkdirp": "^0.5.0",
             "safe-buffer": "^5.1.2",
-            "yallist": "^3.0.2"
+            "yallist": "^3.0.3"
           }
         },
         "util-deprecate": {
@@ -2246,7 +2247,7 @@
           "optional": true
         },
         "yallist": {
-          "version": "3.0.3",
+          "version": "3.1.1",
           "bundled": true,
           "dev": true,
           "optional": true
@@ -2815,9 +2816,9 @@
       }
     },
     "kind-of": {
-      "version": "6.0.2",
-      "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
-      "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.3.tgz",
+      "integrity": "sha512-dcS1ul+9tmeD95T+x28/ehLgd9mENa3LsvDTtzm3vyBEO7RPptvAD+t44WVXaUjTBRcrpFeFlC8WCruUR456hw==",
       "dev": true
     },
     "lcid": {
@@ -3167,11 +3168,18 @@
       }
     },
     "mkdirp": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "version": "0.5.5",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
+      "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
       "requires": {
-        "minimist": "0.0.8"
+        "minimist": "^1.2.5"
+      },
+      "dependencies": {
+        "minimist": {
+          "version": "1.2.5",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
+        }
       }
     },
     "mocha": {
@@ -3202,6 +3210,16 @@
         "yargs": "13.3.0",
         "yargs-parser": "13.1.1",
         "yargs-unparser": "1.6.0"
+      },
+      "dependencies": {
+        "mkdirp": {
+          "version": "0.5.1",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
+          "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+          "requires": {
+            "minimist": "0.0.8"
+          }
+        }
       }
     },
     "mocha-junit-reporter": {
@@ -3257,13 +3275,6 @@
       "integrity": "sha1-MHXOk7whuPq0PhvE2n6BFe0ee6s=",
       "dev": true
     },
-    "nan": {
-      "version": "2.14.0",
-      "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.0.tgz",
-      "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==",
-      "dev": true,
-      "optional": true
-    },
     "nanomatch": {
       "version": "1.2.13",
       "resolved": "https://registry.npmjs.org/nanomatch/-/nanomatch-1.2.13.tgz",