(15 points) Consider the following ARM program. Trace the stack activity, including all changes to the stack pointer and to the contents of the stack. Clearly indicate the value of the sp. : int main) f int P 3: int Q =-1; P Func1 (P) ; Funcl (Q): int Funcl (intx) t if (x> 0) x-Times16 (x) + 1; else x -32*x return (x): : int Times16(int x) f x = 16"X; return(x): AREA NESTED SUBROUTINE STACK, CODE, READWRITE ENTRY ADR ADR r4, P r5, Q sp, #0 12 16 20 24 28 32 36 40 done MOV fp,#0x0000C000 LDR ro, [r4] BL STR rl, (r4] LDR ro, (r5] BL STR Funcl Funci rl, [r5) done B 44 Funcl PUSH (fp) #0 48 52 56 CMP PUSHGT {lr) PUSHGT (ro) BLGT Times16 POPGT POPGT r0, 60 64 (rl) 68 72 76 {ir } ADDGT r1, r1 , #1 MOVIE 80 84 POP MOV r1, ro, LSL #5 (fp) pc, lr 88 Times16 POP 7 92 r7, r7, LSL#4 MOV PUSH (r7) MOV AREA NESTEDSUBROUTINESTACK, DATA, READWRITE 96 100 pc, lr - - 104 P 108 0 DCD DCD -1 END