1) A half-adder is a device that can add two one-bit numbers.
     (Ex: 1+0=1, 1+1=10, etc)
Using the "functional" approach, design a half-adder.
Be sure to give Sum of Products equations and draw the gate diagram.

2) A Full-Adder is a device that can add three one-bit numbers:
    (Ex: 1+0+0 = 1, 1+1+0=10, etc,)
Using the "functional" approach, design a full-adder.
Be sure to give Sum of Products equations and draw the gate diagram.

3) Use a "conceptual" approach to build an 8-input multiplexor from 2-bit and 4-bit multiplexors.