7. If F(w,x,y,z) = w'x'y'z' + w'z + w'x'yz' + w'xy'z' + wx'y

a) Create the Kmaps and then simplify F(w,x,y,z) (leave in sum-of-products form).

b) After simplifying F(w,x,y,z) draw the combinational circuit that directly implements the Boolean expression.