$4\mathrm{.}12$ Minimize each of the following functions for $F$ using a K$-$map and don't care conditions, $d.$

$($a$),F(A,B,C,D)=M(1,3,5,6,8,9,10,14,15),$ Don't Cares, $d(A,B,C,D)=m(0,4)$

$($b$),F(A,B,C,D)=m(0,1,4,5,12,13),$ Don't Cares, $d(A,B,C,D)=m(2,6,14)$

a$)$

$\backslash$table$[[AB,00,01,11,10],[00,x,0,0,],[01,x,0,,0],[11,,,0,0],[10,0,0,,0]]$