Use a Karnaugh Map to optimize the following Boolean functions: A. f(w,y,y,z)=m(0,1,6,7,10,11,12,13) B. f(a,b,c,d)=m(0,2,5,7,8,10,13,15) C. f(w,x,y,z)=m(3,4,5,6,11,15) D. f(a,b,c,d)=m(1,4,6,7,9,12,14,15)