01. Show the changes in stack and the stack pointer when the following 8051 assembly code is executed.Assume initial default-value of the stack pointer MOV R0, #25H MOV R3, #24H PUSH 0 PUSH 3 CALL Delay Delay: DJNZ R3, Delay XXXX: NOP RET And now the following code is executed. Show (in separate diagrams) the changes in stack an the stack pointer when the following code is executed. Also, list the final values of RO and R3. CLR A MOV R3, A POP 0 POP 3 Q2. Find the time needed to execute the following routine by 8051 microcontroller if a clock frequency of 12 MHz is used. Machine cycles needed are listed within parentheses. Machine Code 7D96 DD?? Assembly code MOV R5, #150 NOP DJNZ R5, LOOP RET (1) LOOP: (2) Also, write the equation to find offset value at "??' in the machine code if the program starts at address 0000. Q3. Write a program to continuously toggle all bits of register A with a delay in betwe Assume that the above delay routine of Q1 will be called for the delay (name of the routin "Delay')