diff --git a/Week04/functions_berra_soyler.py b/Week04/functions_berra_soyler.py
new file mode 100644
index 00000000..ff366cc6
--- /dev/null
+++ b/Week04/functions_berra_soyler.py
@@ -0,0 +1,50 @@
+from typing import Callable, Tuple, Dict
+
+custom_power = lambda x=0, /, e=1: x**e
+"""
+A lambda function that raises x to the power of e.
+
+:param x: The positional-only integer base parameter for the power calculation, default is 0.
+:param e: The positional-or-keyword integer exponent parameter for the power calculation, default is 1.
+:return: The result of x raised to the power of e.
+:rtype: int
+"""
+
+def custom_equation(x: int = 0, y: int = 0, /, a: int = 1, b: int = 1, *, c: int = 1) -> float:
+    """
+    Calculate a custom equation with specified base, exponent, and divisor values.
+
+    :param x: The positional-only integer base parameter for the equation, default is 0.
+    :param y: The positional-only integer base parameter for the equation, default is 0.
+    :param a: The positional-or-keyword integer exponent parameter for x, default is 1.
+    :param b: The positional-or-keyword integer exponent parameter for y, default is 1.
+    :param c: The keyword-only integer divisor parameter for the equation, default is 1.
+    :return: The result of the calculation as a float, computed as (x**a + y**b) / c.
+    :rtype: float
+    """
+    return (x**a + y**b) / c
+
+def fn_w_counter() -> Tuple[int, Dict[str, int]]:
+    """
+    Track and return the number of function calls and caller information.
+
+    This function maintains an internal counter and a dictionary to record
+    how many times it has been called from each caller. It returns the
+    total number of calls and a dictionary with caller names as keys
+    and their respective call counts as values.
+
+    :return: A tuple where the first element is the total number of calls (int),
+             and the second element is a dictionary with caller names as keys
+             and the number of calls from each caller as values.
+    :rtype: Tuple[int, Dict[str, int]]
+    """
+    if not hasattr(fn_w_counter, '_call_counter'):
+        fn_w_counter._call_counter = 0
+        fn_w_counter._caller_dict = {}
+    caller = __name__
+    fn_w_counter._call_counter += 1
+    if caller in fn_w_counter._caller_dict:
+        fn_w_counter._caller_dict[caller] += 1
+    else:
+        fn_w_counter._caller_dict[caller] = 1
+    return fn_w_counter._call_counter, fn_w_counter._caller_dict