Commit c96a7bd

@@ -78,3 +78,16 @@ Chapter 4:
       ```
 
 Chapter 5:
+
+
+3. A memory unit that is said to be 640 KB would actually contain how many memory cells? What about a memory of 512 MB? What about a memory of 2 GB?
+
+    The standard cell size of each member cell is 8 bits or 1 byte.
+
+    ```plaintext
+    | Value  | Bytes         |
+    | -----  | -----         |
+    | 640 KB | 655,360       |
+    | 512 MB | 536,870,912   |
+    | 2 GB   | 2,147,483,648 |
+    ```