Mr. Sanderson marks his class on a normal curve. Those with z-scores above 2.1 will receive an A, those between 2.1 and 0.9 will receive a B, those between 0.9 and negative 1.1 will receive a C, those between negative 1.1 and negative 2.3 will receive a D, and those under negative 2.3 will receive an F. Determine the percent of grades that will be A, B, C, D, and F.