diff --git a/Week03/pyramid_tarik_bozgan.py b/Week03/pyramid_tarik_bozgan.py
new file mode 100644
index 00000000..fa762647
--- /dev/null
+++ b/Week03/pyramid_tarik_bozgan.py
@@ -0,0 +1,7 @@
+def calculate_pyramid_height(number_of_blocks):
+    height = 0
+    while(number_of_blocks >= 0):
+        height += 1
+        number_of_blocks -= height
+    return height - 1
+
diff --git a/Week04/decorators_tarik_bozgan.py b/Week04/decorators_tarik_bozgan.py
new file mode 100644
index 00000000..3d4dd207
--- /dev/null
+++ b/Week04/decorators_tarik_bozgan.py
@@ -0,0 +1,23 @@
+import time, tracemalloc
+from functools import wraps
+
+def performance(func):
+    performance.c = performance.c + 1 if hasattr(performance, "c") else 1
+    performance.t = getattr(performance, "t", 0.0)
+    performance.m = getattr(performance, "m", 0)
+
+    @wraps(func)
+    def wrapper(*a, **k):
+        performance.c += 1
+        t0 = time.perf_counter()
+        tracemalloc.start()
+        r = func(*a, **k)
+        performance.t += time.perf_counter() - t0
+        performance.m += tracemalloc.get_traced_memory()[1]
+        tracemalloc.stop()
+        return r
+    return wrapper
+
+performance.counter = 0
+performance.total_time = 0.0
+performance.total_mem = 0
\ No newline at end of file
diff --git a/Week04/functions_tarik_bozgan.py b/Week04/functions_tarik_bozgan.py
new file mode 100644
index 00000000..16fba91b
--- /dev/null
+++ b/Week04/functions_tarik_bozgan.py
@@ -0,0 +1,23 @@
+custom_power = lambda x=0, /, e=1: x**e
+"""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 result.
+    :param x: Base number 1
+    :param y: Base number 2
+    :param a: Exponent for x
+    :param b: Exponent for y
+    :param c: Divisor
+    :return: The calculated result as a float
+    """
+    return (x**a + y**b) / c
+
+
+def fn_w_counter() -> tuple[int, dict[str, int]]:
+    caller = __name__ if __name__ != "<lambda>" else "lambda"
+    fn_w_counter.total = getattr(fn_w_counter, "total", 0) + 1
+    fn_w_counter.callers = getattr(fn_w_counter, "callers", {})
+    fn_w_counter.callers[caller] = fn_w_counter.callers.get(caller, 0) + 1
+    return fn_w_counter.total, fn_w_counter.callers.copy()
\ No newline at end of file