66. Demultiplexer

How do you plan to solve it?

module demux1to4(input d, input [1:0]s, output [3:0]y);
    assign y={4{d}}&{s[1]&s[0],s[1]&~s[0],~s[1]&s[0],~s[1]&~s[0]};
endmodule