/**
 * 4-way demultiplexor:
 * {a, b, c, d} = {in, 0, 0, 0} if sel == 00
 *                {0, in, 0, 0} if sel == 01
 *                {0, 0, in, 0} if sel == 10
 *                {0, 0, 0, in} if sel == 11
 */

`default_nettype none
module DMux4Way(
    input in,
    input [1:0] sel,
    output a,
    output b,
    output c,
    output d
);

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

    DMux DMUXA(in, sel[1], outx, outy);
    DMux DMUXB(outx, sel[0], a, b);
    DMux DMUXC(outy, sel[0], c, d);

endmodule