$(18$pts$)$a$.$ Show the stack and stack pointer for each line of the following program. b$.$ Does the sequence of POP instructions restore the original values of registers $R0,R3,$ and $R7?$ If not show the correct sequence of instructions.

$\backslash$table$[[,$ORG $0.],[$MOV$,$R$0,$#$66$H$],[$MOV$,$R$3,$#$7$FH$],[$MOV$,$R$7,$#$5$DH$],[$PUSH$,0],[$PUSH$,3],[$PUSH$,7],[$CLR$,$A$],[$MOV$,$R$3,$A$],[$MOV$,$R$7,$A$],[$POP$,3],[$POP$,7],[$POP$,0f$