diff --git a/Week04/functions_Sevval_Ok.py b/Week04/functions_Sevval_Ok.py
new file mode 100644
index 00000000..f81f89d9
--- /dev/null
+++ b/Week04/functions_Sevval_Ok.py
@@ -0,0 +1,24 @@
+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:
+    return (x ** a + y ** b) / c
+
+_call_total = 0
+_callers = {}
+
+def fn_w_counter():
+    global _call_total, _callers
+
+    caller = __name__
+    _call_total += 1
+    _callers[caller] = _callers.get(caller, 0) + 1
+
+    return _call_total, _callers