Question 2 (80 pts): Draw circuits using NMOS transistors to implement each of the four logic functions as shown below. 1) (10 pts) f(x,,x2)-T2; 2) (20 pts) f (x1, X2, X3-Xy . X2 . X3 3) (10 pts) f(x,, x2)-x, +x2; 4) (20 pts) f(x1, X2, X3 ) = X1X2X3 5) (20 pts) f (x1, X2, x3, x.) = X1 . X2 + x3 "X4 + x