diff --git a/Week03/sequences_miray_cengil.py b/Week03/sequences_miray_cengil.py
new file mode 100644
index 00000000..fb4c6eb3
--- /dev/null
+++ b/Week03/sequences_miray_cengil.py
@@ -0,0 +1,21 @@
+def remove_duplicates(seq: list) -> list:
+    unique_list = []
+    for number in seq:
+        if number not in unique_list:
+            unique_list.append(number)
+    return unique_list
+
+def list_counts(seq: list) -> dict:
+    counts = {}
+    for item in seq:
+        if item in counts:
+            counts[item] += 1
+        else:
+            counts[item] = 1
+    return counts
+
+def reverse_dict(d: dict) -> dict:
+    new_dict = {}
+    for key, value in d.items():
+        new_dict[value] = key
+    return new_dict