Using the Quine$-$McCluskey method, find all minimum sum$-$of$-$products expressions for the fo $A_r{B}_r{C}_r{D}_r$ and $E_{.})$

$($a$)f(A,B,C,D,E)={\displaystyle \underset{?}{\overset{?}{}}}m(0,1,2,3,4,8,9,10,11,19,21,22,23,27,28,29,30)$

$($b$)f(A_s{B}_r{C}_{r}D,E)={\displaystyle \underset{?}{\overset{?}{}}}m(0,1,2,4,8,11,13,14,15,17,18,20,21,26,27,30,31)$