(a) For a 4-to-1 multiplexer with data inputs DO, D1, D2, D3 and select inputs S1, SO, write the algebraic equation for the output of the multiplexer. (b) From the equation, compute the output of the multiplexer for the select input values S1 = 0, SO = 0. (c) Assume one is to design the XOR function with two variables A, B using a multiplexer. What is the size of the multiplexer needed? Assign A and B to S1 and SO, respectively. What values should DO, D1, D2 and D3, be assigned? Compute the generated equation using part (a) of the problem. Just the answer to part C is fine.