Consider a collection of four populations of humans. These populations are each mating at random locally so each population is at HWE. At the ADH locus (alcohol dehydrogenase) there are two alleles &). The frequencies of each allele in each population are given below. + Allele 0.98 0.04 0.69 0.00 Population 1 2 3 4 -Allele 0.02 0.96 0.31 1.00 What is the observed heterozygosity (Hs) across the four populations?