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 xor1(sum, a, b);
    and and1(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 sum1, cout1, cout2;
    half_adder ha0(.a(a), .b(b), .sum(sum1), .carry(cout1));
    half_adder ha1(.a(sum1), .b(cin), .sum(sum), .carry(cout2));
    or or1(cout, cout1, cout2);

endmodule