diff --git a/Week03/sequences_aysegul_ezber.py b/Week03/sequences_aysegul_ezber.py
new file mode 100644
index 00000000..935da40a
--- /dev/null
+++ b/Week03/sequences_aysegul_ezber.py
@@ -0,0 +1,17 @@
+def remove_duplicates(seq: list) -> list:
+    """
+    This function removes duplicates from a list.
+    """
+    return list(dict.fromkeys(seq))  # Using dict.fromkeys to remove duplicates while maintaining order.
+
+def list_counts(seq: list) -> dict:
+    """
+    This function counts the number of occurrences of each item in a list.
+    """
+    return {item: seq.count(item) for item in set(seq)}  # Counts occurrences by iterating over unique items in the list.
+
+def reverse_dict(d: dict) -> dict:
+    """
+    This function reverses the keys and values of a dictionary.
+    """
+    return {v: k for k, v in d.items()}  # Swaps keys and values to reverse the dictionary.