Simplify the following Boolean function F$,$ using four$-$variable k$-$maps:$($a$)$ F$($a$,$b$,$c$,$d$)=[$m$(0,3,5,9,13)+$ Ed $(1,2)$Here $"$d$"$ is don't care$($b$)$ F$($a$,$ b$,$c$,$ d$)=$ Er $(0,1,2,5,8,9,10,13,15)$