64. Full Adder

How do you plan to solve it?

// Half Adder primitive
module half_adder (
    input  a, b,
    output sum, carry
);
   assign sum=a^b;
   assign carry=a&b;
    
endmodule

// Full Adder using 2 Half Adders
module full_adder_struct (
    input  a, b, cin,
    output sum, cout);
    wire s1,c1,c2;
    half_adder ha1(a,b,s1,c1);
    half_adder ha2(s1,cin,sum,c2);
    assign cout=c1|c2;

   

endmodule