We have discussed both a 2-input and 3-input adders for single-bit values as we were building our ripple carry adder. Draw a 4 -input adder for single-bit values: that is, a set of logic gates with 4 input wires (no need to name them) each representing a number between o and 1 and a multi-bit output z, composed of wires z0 through z... (where z0 is the low-order bit, z1 the next, etc., up to the number of wires needed for this task). The gates should ensure that z= the sum of all four inputs