A human population in Samoa has two alleles $($A and B$)$ at the RAG$2$ gene. The relative fitness values of the three genotypes are

wAA $=0\mathrm{.}92$

wAB $=1\mathrm{.}0$

wBB $=0\mathrm{.}87$

At the current time, the frequencies of the two alleles are f$($A$)=0\mathrm{.}72$ and f$($B$)=0\mathrm{.}28.$

A$.$ Which allele $($A$,$ B$,$ or neither$)$ is genetically dominant?

B$.$ Which allele $($A$,$ B$,$ or neither$)$ is most common in this population?