Using k$-$maps, simplify the Boolean function, together with don't care conditions, to:

a$.$ sum$-$of$-$products form

b$.$ product$-$of$-$sums form.

$F(A,B,C,D)=(0,3,6,8,11,14)$

$d(A,B,C,D)=(2,4,10,12,15)$