66. Demultiplexer

How do you plan to solve it?

module demux1to4 (d, s, y);
input d;
input [1:0]s;
output reg [3:0]y;
integer i;
always @(*)
begin
    for(i=0;i<=4;i++)
    begin
        if(s==i) y[i]=d;
        else y[i]=1'b0;
    end
end
endmodule