64. Full Adder

How do you plan to solve it?

// Half Adder primitive
module half_adder (
    input  a, b,
    output sum, carry
);
    // Write code here
    xor (sum,a,b);
    and (carry,a,b);
    
endmodule

// Full Adder using 2 Half Adders
module full_adder_struct (
    input  a, b, cin,
    output sum, cout
);
    // Write code here
    wire p,q,r;
    half_adder h1 (.a(a), .b(b), .sum(p), .carry(q));
    half_adder h2 (.a(p), .b(cin), .sum(sum), .carry(r));
    assign cout = q | r ;



endmodule