diff --git a/Week03/sequences_esra_kaya.py b/Week03/sequences_esra_kaya.py
new file mode 100644
index 00000000..8e2cb3a9
--- /dev/null
+++ b/Week03/sequences_esra_kaya.py
@@ -0,0 +1,24 @@
+def remove_duplicates(seq: list) -> list:
+    """
+    This function removes duplicates from a list.
+    """
+    return list(set(seq))
+
+def list_counts(seq: list) -> dict:
+    """
+    This function counts the number of occurrences of each item in a list.
+    """
+    counts = {}
+    for item in seq:
+        if item in counts:
+            counts[item] += 1
+        else:
+            counts[item] = 1
+    return counts
+
+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()}
+