4. Simplify the following Boolean expressions to sum of products form using three variable K- maps. a. F(x, y, z)=x'y'+ yz + x'yz' b. F.(x, y, z)=x'y+ yz'+y'z' c. F(x, y, z)= xy + x'y'z'+x' yz d. F.(x, y, z) = x' yz + xy'z'+ xy'z 5. Simplify problem 4b.) by circling the zeros of the function and using maxterms simplify to Product of Sums