66. Demultiplexer

How do you plan to solve it?

/*Write your code here*/
module demux1to4 (
    input d,
    input [1:0] s,
    output reg [3:0] y
);

always @ (*) begin
    y = 0;
    case (s)
        2'b00 : y[0] = d;
        2'b01 : y[1] = d;
        2'b10 : y[2] = d;
        2'b11 : y[3] = d;
    endcase
end

endmodule