diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
-# data-structer
-"Implementations of common data structures with examples and tests."
+# Merge Sort
+## Proje 3
 
+**[16,21,11,8,12,22]** -> Merge Sort
+
+- Yukarıdaki dizinin sort türüne göre aşamalarını yazınız.
+- Big-O gösterimini yazınız.
diff --git a/merge-sort-project.md b/merge-sort-project.md
new file mode 100644
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--- /dev/null
+++ b/merge-sort-project.md
@@ -0,0 +1,15 @@
+# Project 3 
+
+**[16,21,11,8,12,22]**
+
+- [16,21,11] ------  [8,12,22]
+- [16] --  [21,11]    ------      [8,12] -- [22]
+- [16]  -- [21] [11]    ------      [8] -- [12] -- [22]
+- [16]  -- [11,21] -----         [8,12] -- [22]  **Birleştirme (Merge) Aşaması**
+- [11,16,21] ------      [8,12,22]
+- [8,11,12,16,21,22]
+
+**Big-O Notion** -> O(nlogn) 
+
+- Bölme: log n
+- Her seviyede birleştirme: n