3. http://courses.cs.vt.edu/~csonline/MachineArchitecture/Lessons/CPU/Lesson.html. Access the following link, read the page and run one of the sum and count programs (you need to view animation and then click on run tutorial). Note that the process design in that page is just a simplified processor and does NOT represent any real processor (such MIPS, ARM, Intel, etc.). However, the concepts described are the same to those we discussed in the class and are generic to any processor. After reading and running the tutorial answer the following questions:

a. Define the PC and the IR registers?

b. When you run the tutorial what is the content of the PC register and the IR register?

c. There are two buttons that enable to show the code as assembly code or machine code. Why you click on machine code the number of instructions does not change compare to the assembly code, explain why?

d. If you were to convert this program to a C program, do you think the number of instructions will be the same in the C program as in the assembly program?

e. If each instruction is 32 bits, what is the size of the sum program.