64. Full Adder

How do you plan to solve it?

// Half Adder primitive
module half_adder (
    input  a, b,
    output sum, carry
);
    xor x1 (sum,a,b);
    and a1 (carry,a,b);
    
endmodule

// Full Adder using 2 Half Adders
module full_adder_struct (
    input  a, b, cin,
    output sum, cout
); 
wire w1,w2,w3;
    half_adder h1 (.a(a),.b(b),.sum(w1),.carry(w2));
    half_adder h2 (.a(w1),.b(cin),.sum(sum),.carry(w3));
    or o1 (cout,w2,w3);


endmodule