diff --git a/Week04/functions_afra_inanc.py b/Week04/functions_afra_inanc.py
new file mode 100644
index 00000000..64c7ae18
--- /dev/null
+++ b/Week04/functions_afra_inanc.py
@@ -0,0 +1,34 @@
+custom_power = lambda x=0, /, e=1: x**e
+
+
+def custom_equation(x: int = 0, y: int = 0, /, a: int = 1, b: int = 1, *, c: int = 1) -> float:
+    """
+    Calculates the equation (x**a + y**b) / c.
+
+    :param x: The base of the first term, positional-only
+    :type x: int
+    :param y: The base of the second term, positional-only
+    :type y: int
+    :param a: The exponent of the first term
+    :type a: int
+    :param b: The exponent of the second term
+    :type b: int
+    :param c: The divisor, keyword-only
+    :type c: int
+    :return: The result of (x**a + y**b) / c
+
+    """
+
+    return (x**a + y**b) / c
+
+
+_total_calls = 0
+_calls_by_caller = {}
+
+
+def fn_w_counter() -> (int, dict[str, int]):
+    
+    global _total_calls
+    _total_calls += 1
+    _calls_by_caller[__name__] = _calls_by_caller.get(__name__, 0) + 1
+    return _total_calls, dict(_calls_by_caller)