For the following C code, variables a, b, c, and n correspond to the registers $s0, $s1, $s2 and $a0 respectively and i corresponds to $t0. The callee doesn’t have to preserve registers $t1-$t9, if used. int iterFib(int n) { int a = 0, b = 1, c, i; for(i=2; i<=n; i++) { c = a + b; a = b; b = c; } return b; } What are the missing MIPS instructions? Please record only the letter in lower case. iterFib: addi $sp, $sp, -12 sw $s0, 8($sp) sw $s1, 4($sp) ---Instruction 1--- add $s0, $zero, $zero addi $s1, $zero, 1 add $t0, $zero, $zero addi $t1, $a0, 1 forFib: slt $t2, $t0, $t1 ---Instruction 2--- add $s2, $s1, $s2 add $s0, $zero, $s1 add $s1, $zero, $s2 addi $t0, $t0, 1 j forFib exitFib: add $v0, $zero, $s1 jr $ra Instruction 1 is a. No instruction b. addi $sp, $sp, 4 c. add $sp, $sp, -4 d. lw $s2, 0($sp) e. sw $s2, 0($sp) f. bne $t2, $zero, exitFib g. beq $t2, $zero, exitFib h. None of the above Instruction 2 is a. j iterFib b. addi $sp, $sp, 4 c. add $sp, $sp, -4 d. lw $s0, 0($sp) e. addi $sp, $sp, -4 f. bne $t2, $zero, exitFib g. beq $t2, $zero, exitFib h. None of the above