Based on the register and memory contents specified, find the value of the

register R$0$ for each of the following operations.

Memory

$($i$)$ MOV R$0,$ #$1111$

$($ii$)$ LDR R$0,$ R$1$

$($iii$)$ LDR R$0,[$R$2]$

$($iv$)$ LDR R$0,[$R$1,$ R$2]$

Suppose that the programming instructions are found at the locations in main

memory as shown in the following diagram:

Briefly explain how these programming instructions are executed by the CPU

using the PC$,$ IR$,$ MAR, MBR and Execution unit.