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 x,y,z;
    half_adder ha1(.a(a), .b(b), .sum(x), .carry(y));
    half_adder ha2(.a(x), .b(cin), .sum(sum), .carry(z));
    or o1(cout,y,z);
endmodule