2. Fan-Out Wire

How do you plan to solve it?

module top_module(
    // Declare Inputs and outputs here
    input wire a, 
    output wire y1, y2, y3
);
    // Module functionality here
    wire y1_sig, y2_sig, y3_sig; 

    assign y1 = y1_sig;
    assign y2 = y2_sig;
    assign y3 = y3_sig;

    assign y1_sig=a;
    assign y2_sig=a; 
    assign y3_sig=a; 

endmodule