Computer Architecture

Question 1) Do the following loops have a loop-carried dependency?

a) for (int i=0; i < 100; i++) {

A[i] = B[2*i+4];

B[4*i+5] = A[i];

}

b) Are there dependences between S1 and S2? Is this loop parallel? If not, show how to make it parallel.

for (i=0;i < 100;i++) {

A[i] = A[i] + B[i]; /* S1 */

B[i+1] = C[i] + D[i]; /* S2 */

}