The human MN blood group is determined by two codominant alleles, M and N. The following data were obtained from various human populations:

Percentages*
Population Place MM MN NN
Inuit East Greenland 83.5 15.6 0.9
Navajo Indians New Mexico 84.5 14.4 1.1
Finns Karajala 45.7 43.1 11.2
Russians Moscow 39.9 44.0 16.1
Aborigines Queensland 2.4 30.4 67.2

a. Calculate the allele frequencies in these five populations.
b. Which populations appear to be in Hardy-Weinberg equilibrium?