66. Demultiplexer

How do you plan to solve it?

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