/**
 * Multiplexor:
 * out = a if sel == 0
 *       b otherwise
 */

`default_nettype none
module Mux(
    input a,
    input b,
    input sel,
    output out
);

    // Put your code here:
    wire nsel;
    wire outx;
    wire outy;

    Not NOT1(sel, nsel);
    And AND1(b, sel, outx);
    And AND2(a, nsel, outy);
    Or OR(outx, outy, out);
endmodule