1) Write down the complete truth table for the following output equations: a) X = AB + b) X=.(B+C) 2) For the following digital circuit: A B -- a) - Write down the output expression? b) - Simplify the output expression? c) - Write down the complete truth table? 3) For the following output expression: X = (A + BC) + (AB + C) +B a) - Draw the circuit for this output expression? b) - Simplify the output expression? c) - Write down the complete truth table? d) - Draw the simplified circuit by using only NAND gates