66. Demultiplexer

How do you plan to solve it?

module  demux1to4(
input d,
input [1:0] s,
output[3:0] y
);
assign y[0] =(s==2'b00)? d:1'b0;
assign y[1] =(s==2'b01)? d:1'b0;
assign y[2] =(s==2'b10)? d:1'b0;
assign y[3] =(s==2'b11)? d:1'b0;
endmodule