1. Are there dependences between S1 and S2 in the following loop? Is the loop parallel? If not, can it be made so (and show how, if yes).

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

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

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

}

2. Do some research, then list and describe briefly (but in more than one sentence) four factors that influence the performance of GPUs.