Determine the frequency of genotypes and the frequency of phenotypes

In humans, the presence of chin and cheek dimples is dominant to the absence of dimples, and
the ability to taste the compound PTC is dominant to the inability to taste the compound. Both
traits are autosomal, and they are unlinked. The frequencies of alleles for dimples are D = 0.62
and d = 0.38. For tasting, the allele frequencies are T = 0.76 and t = 0.24.
a. Determine the frequency of genotypes for each gene and the frequency of each
phenotype.
b. What are the expected frequencies of the four possible phenotype combinations:
dimpled tasters, undimpled tasters, dimpled nontasters, and undimpled nontasters?