diff --git a/Week02/types_tarik_bozgan.py b/Week02/types_tarik_bozgan.py
new file mode 100644
index 0000000..2222af0
--- /dev/null
+++ b/Week02/types_tarik_bozgan.py
@@ -0,0 +1,4 @@
+my_int = 9
+my_float = 9.7
+my_bool = True
+my_complex = 6j
\ No newline at end of file
diff --git a/Week03/pyramid_tarik_bozgan.py b/Week03/pyramid_tarik_bozgan.py
new file mode 100644
index 0000000..fa76264
--- /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/Week03/sequences_tarik_bozgan.py b/Week03/sequences_tarik_bozgan.py
new file mode 100644
index 0000000..cbf9233
--- /dev/null
+++ b/Week03/sequences_tarik_bozgan.py
@@ -0,0 +1,25 @@
+def remove_duplicates(list):
+    seen = set()
+    result = []
+    for item in list:
+        if item not in seen:
+            seen.add(item)
+            result.append(item)
+    return result
+
+
+def list_counts(list):
+    counts = {}
+    for item in list:
+        if item in counts:
+            counts[item] = counts[item] + 1
+        else:
+            counts[item] = 1
+    return counts
+
+
+def reverse_dict(dict):
+    reversed_dict = {}
+    for key, value in dict.items():
+        reversed_dict[value] = key
+    return reversed_dict
\ No newline at end of file
diff --git a/Week04/arrays_tarik_bozgan.py b/Week04/arrays_tarik_bozgan.py
new file mode 100644
index 0000000..370f241
--- /dev/null
+++ b/Week04/arrays_tarik_bozgan.py
@@ -0,0 +1,16 @@
+import numpy as np
+def replace_center_with_minus_one(d, n, m):
+    if m > n or d <= 0 or n < 0 or m < 0:
+        raise ValueError
+    
+    if d == 1:
+        array = np.random.randint(0, 10, size=(n, n))
+    else:
+        array = np.random.randint(10**(d-1), 10**d, size=(n, n))
+
+    border_start = (n - m) // 2
+    border_end = border_start + m
+    
+    array[border_start:border_end, border_start:border_end] = -1
+    
+    return array
\ No newline at end of file