4. Calculate how long it takes for the code to execute, assuming a 1 MHz clock speed. (Watch [https://web.microsoftstream.com/video/ed7aedf1-fe6f-4b72-bbf1-c9b4e6e80af9 this video] if you would like a refresher on how to do this).

5. Consider ways to decrease the time taken to fill the screen with a solid colour. Calculate the execution time of the fastest version of this program that you can create.Challenge: the fastest version of this program is more than twice as fast as the original version shown above!