Mr. Sanderson marks his class on a normal curve. Those with z-scores with z ≥ 1.80 will receive an A, those with 1.10 ≤ z < 1.80 will receive a B, those with -1.20 ≤ z < 1.10 will receive a C, those with -1.90 ≤ z < -1.20 will receive a D, those with z < -1.90 will receive an F. Determine the percent of grades that will be an A, B, C, D, and F.