.35 Implement the following Boolean function with a 41 multiplexer and external gates. (a)* F1(A,B,C,D)=(1,3,4,11,12,13,14,15) (b) F2(A,B,C,D)=(1,2,5,7,8,10,11,13,15) Connect inputs A and B to the selection lines. The input requirements for the four data lines will be a function of variables C and D. These values are obtained by expressing F as a function of C and D for each of the four cases when AB=00,01,10, and 11. These functions may have to be implemented with external gates. (HDL-see Problem 4.47.)