4(a) Write a Boolean expression in sum of product fom for the following truth table. (10 points) A B Output 0 0 0 0 0 0 iD 4(b) Implement a logic circuit diagram using AND and OR gates, for the fiunction represented in the truth table in 6(a). (10 points) 4(c) Implement a logic circuit diagram, using only NAND gates, for the fiunction represented in the truth table in 6(a). (10 points)