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 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
);
    // Write code here
    wire s_a,c_a,c_b;
    half_adder ha0(a,b,s_a,c_a);
    half_adder ha1(s_a,cin,sum,c_b);
    or o1(cout,c_a,c_b);


endmodule