Z A b) [25 points] A combinational digital circuit, X, shown on the B X right has the following logic function: Z=.B.C i. Show that we can use this X circuit as a 2-input universal gate. (10 points) Hint: Constant 0 and 1 values are available as inputs. ii. Design and implement a one-bit half adder using the X circuits given in (a) only. Use the fewest possible number of X circuits to make your circuit design as simple as possible. (15 points)