diff --git a/Week05/shifted_gulfem_solak.py b/Week05/shifted_gulfem_solak.py
new file mode 100644
index 0000000..b8f0276
--- /dev/null
+++ b/Week05/shifted_gulfem_solak.py
@@ -0,0 +1,19 @@
+def shifted(numbers):
+    if not numbers:
+        return 0
+
+    mean_val = sum(numbers) / len(numbers)
+
+    sorted_nums = sorted(numbers)
+    n = len(sorted_nums)
+
+    if n % 2 == 0:
+        median_val = (sorted_nums[n // 2 - 1] + sorted_nums[n // 2]) / 2
+    else:
+        median_val = sorted_nums[n // 2]
+
+    if median_val == 0:
+        return 0
+
+    percentage_difference = ((mean_val - median_val) / abs(median_val)) * 100
+    return percentage_difference