2. Fan-Out Wire

How do you plan to solve it?

module top_module(
    input  a,
    output y1,output y2,output y3
    // Declare Inputs and outputs here
);
    assign y1=a;
    assign y2=a;
    assign y3=a;
   /* assign y1=y2;
    assign y2=y3;
    assign y3=a;*/
    // Module functionality here

endmodule