Identify and correct the errors in the following inline assembly program that calculates the sum of four integers.

__asm int sum4(int a, int b, int c, int d){

// arguments stored in r0 - r3

MOV r4, r0 ; r0 = 1^st argument

ADD r4, r4, r1 ; r1 = 2^nd argument

ADD r4, r4, r2 ; r2 = 3^rd argument

ADD r0, r4, r3 ; r3 = 4^th argument, r0 = return

}

int main(void){

int s = sum4(1, 2, 3, 4);

while(1);

}