Step by Step Problems No.3/Answer

Step 0              Step 1              Step 2              Step 3              Step 4
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+
|       |   |   |   |       |   |   |   |       |   |   |   |       |   |   |   |       |   |XXX|
+---+---+---+   +   +---+---+---+   +   +---+---+---+   +   +---+---+---+   +   +---+---+---+---+
|   |       |   |   |   |       |   |   |   |       |   |   |   |       |   |   |   |       |   |
+---+       +---+   +---+       +---+   +---+       +---+   +---+       +---+   +---+       +   +
|   |       |   |   |   |       |   |   |   |       |   |   |   |       |XXX|   |   |       |   |
+   +---+---+---+   +   +---+---+---+   +   +---+---+---+   +   +---+---+---+   +   +---+---+---+
|   |   |       |   |   |   |       |   |   |   |XXX|XXX|   |   |   |XXX|   |   |   |   |XXX|   |
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+
|XXX|       |XXX|   |       |XXX|XXX|   |       |       |   |       |       |   |       |       |
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+

Step 5              Step 6              Step 7              Step 8              Step 9
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+
|       |XXX|   |   |XXX|       |   |   |   |       |   |   |   |       |   |   |   |       |   |
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+
|   |       |   |   |   |       |   |   |XXX|       |   |   |   |       |   |   |   |       |   |
+---+       +   +   +---+       +   +   +---+       +   +   +   +       +   +   +   +       +   +
|   |       |   |   |   |       |   |   |   |       |   |   |   |       |   |   |   |       |   |
+   +---+---+---+   +   +---+---+---+   +   +---+---+---+   +---+---+---+---+   +---+---+---+---+
|   |   |XXX|   |   |   |   |XXX|   |   |   |   |XXX|   |   |XXX|   |XXX|   |   |XXX|XXX|   |   |
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+
|       |       |   |       |       |   |       |       |   |       |       |   |       |       |
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+

Step 10             Step 11             Step 12             Step 13             Step 14
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+
|   |       |   |   |   |       |   |   |   |       |   |   |   |       |   |   |   |       |   |
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+
|   |       |   |   |   |       |   |   |   |       |   |   |   |       |XXX|   |   |XXX|       |
+   +       +   +   +   +       +   +   +   +       +   +   +   +       +---+   +   +---+       +
|   |       |   |   |   |       |   |   |   |       |   |   |   |       |XXX|   |   |XXX|       |
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+
|       |   |   |   |       |   |   |   |       |   |XXX|   |       |   |   |   |       |   |   |
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+   +   +---+---+---+   +
|XXX|XXX|       |   |       |XXX|XXX|   |       |   |XXX|   |       |   |   |   |       |   |   |
+---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+   +---+---+---+---+