66. Demultiplexer

How do you plan to solve it?

/*Write your code here*/
module demux1to4(
    input [1:0]s,
    input d,
    output [3:0]y
);
assign y[0] = d & ~s[1] & ~s[0] ;
assign y[1] = d & ~s[1] & s[0] ;
assign y[2] = d & s[1] & ~s[0] ;
assign y[3] = d & s[1] & s[0] ;
endmodule