13) If F(A,B,C,D)=ABCD+ABCD+ABCD+ABC+ABD+ABCD+ABD+ACD+A (10 points) a) Create the Kmans, and then simplify F (A, B, C, D) (leave in sum-of-products form). b) After simplifying F (A, B, C, D) draw the combinational circuit that directly implements the Boolean expression