1. Consider the following truth table and the 1-bit ALU that performs AND, OR, and addition on a and b. 0 0 11 0 0 0 Ainvert eration Binvert Carryln 1Result Assume that the Ainvert and Binvert signals can be asserted or deasserted and that the Carryln signal can be deasserted or taken from the CarryOut of the preceding 1-bit ALU. The value of a NOR b can be obtained by asserting Ainvert and Binvert and selecting an AND operation. (a) Describe how the value of a NAND b can be obtained. (10 points) (b) Describe how the value of a XOR b can be obtained. (10 points)