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 c1,s1,c2;
    half_adder a1 (a,b,s1,c1);
    half_adder a2 (s1,cin,sum, c2);
    or(cout , c1,c2);
endmodule