Optimize the following Boolean functions by means of a 4-variable map: (a) F(A, B, C, D)∑m(0,2,4,5,8, 10, 11,15) (b) F(A, B. C. D)∑m(0, 1, 2, 4, 5, 6, 10, 11) (c)FUW, X, Y, Z)∑m(0, 2, 4, 78, 10.12.13)