XOR operator using only AND, OR, and NOT gates. 40. Construct the XOR. Construct the XOR operator using only NAND gates. Hint: x XOR y=((xy)(xy)) 42. Draw a half-adder using only NAND gates. 43. Draw a full-adder using only NAND gates. binary input is 2,3,4, or 5 , the output is the input shifted left with rotate. (F) 3=0112 outputs 110;4=1002 outputs 001 .) Show your truth table, all comp for simplification, and the final circuit. Draw the combinational circuit that directly implements the Boolean expression: F(x,y,z)=xyz+(y+z) 47. Draw the combinational circuit that directly implements the Boolean expression: F(x,y,z)=(x(yXORz))+(xz) 48. Find the truth table that describes the following circuit: 49. Find the truth table that describes the following circuit: 50. Find the truth table that describes the following circuit