a) Expand the Boolean function (, , ) = + , by using Boolean algebra, to get sum-of-minterms and product-of-maxterms representations (Dont use truth table, just use Boolean equations). Show your steps.

b) Simplify (, , , ) = (0, 1, 4, 5, 8, 9, 12, 13) in sum-of-products form, and (, , , ) = (3, 7, 11, 15) in product-of-sums form.