1. (15 pts, 3 pts each) Use postulates and theorems of Boolean algebra and the De Morgan's Law to simplify the following Boolean equations to their minimal forms. a) Y = ABC + ABC + ABC + ABC b) Y = B + ABC + (1 + ABC) + ABC + ABC Y = AB + B d) Y = (A + B + 7).(A + C) e) Y = (ABC + BC)(AB)