A function is declared as follows: void foo(long a, long b, long c, int n); Its body compiles to the following code: # a in %rdi, b in %rsi, c in %rdx, n in %ecx movl $0, %eax .12: .LA: capl %ecx, %eax jge .LA movalq %eax, %r8 mov (%rdx,%r8,8), %r9 addq (%rai,%r8,8), %19 movq Zr9, (Zrdi, %r8,8) addl $1, %eax jmp .L2 ret The C code for the body a loop of the form: int i; for (i=0; a. What register holds the loop variable i? b. What is i compared to in the loop test? e. What do the first three arguments point to? d. What do the three instructions in the middle of the loop (novq, addq. movq) do? e. Say in words what is the purpose of the function.