1) Explain the function of each bit of program status word register. 2) What is the function of the stack? How does it work? Show the stack and stack pointer after executing each line of the following program. ORG 0 MOV RO, #66H MOV R3, #7FH MOV R7, #SDH PUSH PUSH PUSH CLR A MOV R3, A MOV R7, A POP POP POP SJMP END