diff --git a/Week03/... b/Week03/...
new file mode 100644
index 00000000..2c8c6f25
--- /dev/null
+++ b/Week03/...
@@ -0,0 +1,52 @@
+import os
+
+
+files = [f for f in os.listdir(os.path.dirname(__file__)) if f.startswith("pyramid")]
+for f in files:
+    exec("import " + f[:-3] + " as " + f[:-3])
+    print(f"The module {f[:-3]} has been imported.")
+
+
+def test_names():
+    for f in files:
+        assert "calculate_pyramid_height" in dir(eval(f[:-3])), (
+            "calculate_pyramid_height is not defined in " + f[:-3]
+        )
+
+
+def test_types():
+    for f in files:
+        assert callable(eval(f[:-3]).calculate_pyramid_height), (
+            "calculate_pyramid_height is not callable in " + f[:-3]
+        )
+        assert isinstance(eval(f[:-3]).calculate_pyramid_height(1), int), (
+            "calculate_pyramid_height is not returning an int in " + f[:-3]
+        )
+
+
+def test_calculate_pyramid_height():
+    for f in files:
+        assert eval(f[:-3]).calculate_pyramid_height(1) == 1, (
+            "calculate_pyramid_height is not working in " + f[:-3]
+        )
+        assert eval(f[:-3]).calculate_pyramid_height(2) == 1, (
+            "calculate_pyramid_height is not working in " + f[:-3]
+        )
+        assert eval(f[:-3]).calculate_pyramid_height(6) == 3, (
+            "calculate_pyramid_height is not working in " + f[:-3]
+        )
+        assert eval(f[:-3]).calculate_pyramid_height(20) == 5, (
+            "calculate_pyramid_height is not working in " + f[:-3]
+        )
+        assert eval(f[:-3]).calculate_pyramid_height(100) == 13, (
+            "calculate_pyramid_height is not working in " + f[:-3]
+        )
+        assert eval(f[:-3]).calculate_pyramid_height(1000) == 44, (
+            "calculate_pyramid_height is not working in " + f[:-3]
+        )
+        assert eval(f[:-3]).calculate_pyramid_height(10000) == 140, (
+            "calculate_pyramid_height is not working in " + f[:-3]
+        )
+        assert eval(f[:-3]).calculate_pyramid_height(100000) == 446, (
+            "calculate_pyramid_height is not working in " + f[:-3]
+        )
diff --git a/Week03/pyramid_tarik_bozgan.py b/Week03/pyramid_tarik_bozgan.py
new file mode 100644
index 00000000..a742a203
--- /dev/null
+++ b/Week03/pyramid_tarik_bozgan.py
@@ -0,0 +1,6 @@
+def calculate_pyramid_height(number_of_blocks):
+    height = 0
+    while(number_of_blocks >= 0):
+        height += 1
+        number_of_blocks -= height
+    return height - 1
\ No newline at end of file
diff --git a/Week03/sequences_tarik_bozgan.py b/Week03/sequences_tarik_bozgan.py
new file mode 100644
index 00000000..1ba02067
--- /dev/null
+++ b/Week03/sequences_tarik_bozgan.py
@@ -0,0 +1,23 @@
+def remove_duplicates(seq):
+    result = []
+    for item in seq:
+        if item not in result:
+            result.append(item)
+    return result
+
+
+def list_counts(seq):
+    counts = {}
+    for item in seq:
+        if item in counts:
+            counts[item] += 1
+        else:
+            counts[item] = 1
+    return counts
+
+
+def reverse_dict(d):
+    reversed_dict = {}
+    for key, value in d.items():
+        reversed_dict[value] = key
+    return reversed_dict
\ No newline at end of file
diff --git a/Week04/decorators_tarik_bozgan.py b/Week04/decorators_tarik_bozgan.py
new file mode 100644
index 00000000..718e0a3b
--- /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
diff --git a/Week04/functions_tarik_bozgan.py b/Week04/functions_tarik_bozgan.py
new file mode 100644
index 00000000..60492966
--- /dev/null
+++ b/Week04/functions_tarik_bozgan.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:
+    """
+    :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}