diff --git a/Week03/sequences_batuhan_ayyildiz.py b/Week03/sequences_batuhan_ayyildiz.py
new file mode 100644
index 00000000..b81afd66
--- /dev/null
+++ b/Week03/sequences_batuhan_ayyildiz.py
@@ -0,0 +1,25 @@
+def remove_duplicates(seq: list) -> list:
+    """
+    Removes duplicate elements from a list and returns a new list with unique elements only.
+    """
+    return list(set(seq))
+
+
+def list_counts(seq: list) -> dict:
+    """
+    Counts the occurrences of each element in a list and returns a dictionary with element frequencies.
+    """
+    result = dict.fromkeys(seq, 0)
+    for i in seq:
+        result[i] += 1
+    return result
+
+
+def reverse_dict(d: dict) -> dict:
+    """
+    Reverses the keys and values in a dictionary.
+    """
+    result = {}
+    for i in d.items():
+        result[i[1]] = i[0]
+    return result