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..7dd4d60a
--- /dev/null
+++ b/Week04/decorators_tarik_bozgan.py
@@ -0,0 +1,26 @@
+import time
+import tracemalloc
+
+def performance(func):
+    def wrapper(*args, **kwargs):
+        tracemalloc.start()
+        t1 = time.perf_counter()
+        
+        result = func(*args, **kwargs)
+        
+        t2 = time.perf_counter()
+        _, peak = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+        
+        # Hata buradaydı: Sayaçları wrapper'a değil, performance fonksiyonuna ekliyoruz
+        performance.counter += 1
+        performance.total_time += (t2 - t1)
+        performance.total_mem += peak
+        
+        return result
+    return wrapper
+
+# Testin beklediği özellikler (Attributes) ana fonksiyona atanmalı
+performance.counter = 0
+performance.total_time = 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..165bdf25
--- /dev/null
+++ b/Week04/functions_tarik_bozgan.py
@@ -0,0 +1,25 @@
+# x parametresine =0 ekledik, testin istediği bu.
+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:
+    """
+    :param x:
+    :param y:
+    :param a:
+    :param b:
+    :param c:
+    :return:
+    """
+    if not isinstance(x, int): raise TypeError("x must be int")
+    if not isinstance(y, int): raise TypeError("y must be int")
+    if not isinstance(a, int): raise TypeError("a must be int")
+    if not isinstance(b, int): raise TypeError("b must be int")
+    if not isinstance(c, int): raise TypeError("c must be int")
+    
+    return float((x ** a + y ** b) / c)
+
+_count = 0
+def fn_w_counter() -> (int, dict[str, int]):
+    global _count
+    _count += 1
+    return _count, {__name__: _count}
\ No newline at end of file