How many iterations (if any) will each of the following loops make?

for (int a = 0; a < 8; a++) {}
for (int b = 3; b >= 0; b--) {}
while (true)
for (int d = 0; d <= 17; d += 3) {}
for (int e = 30; e < 0; e -= 10) {}
a) 8, 4, Infinite, 6, 0
b) 8, 3, Infinite, 5, Infinite
c) 7, 4, Infinite, 6, 0
d) 8, 4, 0, 6, 3