change the pic of week1

index.html

@@ -66,7 +66,7 @@
       <div class="row">
         <div class="col-md-7">
           <a href="w1.html">
-            <img class="img-fluid rounded mb-3 mb-md-0" src="image/assignment/w1/010" width="700" height="300" alt="">
+            <img class="img-fluid rounded mb-3 mb-md-0" src="image/assignment/w1/010.png" width="700" height="300" alt="">
           </a>
         </div>
         <div class="col-md-5">