In wild sheep, horned is dominant trait hornless. if 25% of the sheep in a large population have horns, calculate the following frequencies. Assume the population is in HW equilibrium.

a. The frequency of true-breeding white sheep.
b. The frequency of heterozygous sheep with white coats.
c. The frequencies of white and black sheep.
d. The number of white and black sheep you would expect to find in a population of 750.