Use K map method to minimize the following three functions into SOP form:

$($a$)$ f$($A$,$B$,$C$,$D$)=$ Sm$(0,1,2,5,7,8,10,11,13,15)$

$($b$)$ g$($A$,$B$,$C$,$D$,$E$)=$ Sm$(0,1,3,4,7,11,12,15,16,17,20,28)$

$($c$)$ h$($A$,$B$,$C$,$D$,$E$,$F$)=$ Sm$(2,5,7,8,10,13,18,21,23,24,26,29,34,37,39,40,42,44,45,46,47,50,53,55,56,58,60,61)$