diff --git a/Week04/decorators_ardadeniz_kinikli.py b/Week04/decorators_ardadeniz_kinikli.py
new file mode 100644
index 00000000..3d7c1fc2
--- /dev/null
+++ b/Week04/decorators_ardadeniz_kinikli.py
@@ -0,0 +1,25 @@
+import time
+import tracemalloc
+def performance(func):
+    if not hasattr(performance,"counter"):
+        setattr(performance,"counter",0)
+    
+    if not hasattr(performance,"total_time"):
+        setattr(performance,"total_time",0)
+    
+    if not hasattr(performance,"total_mem"):
+        setattr(performance,"total_mem",0)
+    
+    def _d1(*args,**kwargs):
+         tracemalloc.start()
+         start_time = time.perf_counter()
+         result = func(*args,**kwargs)
+         end_time = time.perf_counter()
+         elapsed = end_time - start_time
+         current_mem, peak_mem = tracemalloc.get_traced_memory()
+         performance.counter += 1
+         performance.total_time += elapsed
+         performance.total_mem += peak_mem
+         return result
+    return _d1
+
diff --git a/Week04/functions_ardadeniz_kinikli.py b/Week04/functions_ardadeniz_kinikli.py
new file mode 100644
index 00000000..175ef012
--- /dev/null
+++ b/Week04/functions_ardadeniz_kinikli.py
@@ -0,0 +1,31 @@
+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:
+    """
+    This function computes the result of the expression (x**a + y**b) / c.
+
+    :param x: The base for the first exponentiation. Positional-only.
+    :type x: int
+    :param y: The base for the second exponentiation. Positional-only.
+    :type y: int
+    :param a: The exponent for x. Positional-or-keyword.
+    :type a: int
+    :param b: The exponent for y. Positional-or-keyword.
+    :type b: int
+    :param c: The divisor. Keyword-only. Defaults to 1.
+    :type c: int
+    :returns: The result of the calculation.
+    :rtype: float
+    
+    """
+    return (custom_power(x,a) + custom_power(y,b))/c
+
+def fn_w_counter() -> (int, dict[str, int]):
+    if not hasattr(fn_w_counter, "count"):
+        setattr(fn_w_counter, "count", 0)
+        setattr(fn_w_counter,"dictionary",{})
+    fn_w_counter.count += 1
+    fn_w_counter.dictionary[(str)(__name__)] = fn_w_counter.count
+    return fn_w_counter.count,fn_w_counter.dictionary
+
+