Let us consider a memory that includes two instructions. First instruction is located at memory address 045 that includes an address mode bit 0, an operation code 101, an address 160. The second instruction is located at the end of a subroutine that includes an address mode bit 1, an operation code 100, an address 160. The subroutine starts at memory location 161 and the content of the PC is equal to 046.

a) Draw two block diagrams of the memory to represent the status of the above instructions before and after execution phase;

b) State the relationship between two instructions mentioned