64. Full Adder

How do you plan to solve it?

// Half Adder primitive
module half_adder (
    input  a, b,
    output sum, carry
);
assign sum = a ^b;
assign carry = a&b;
    // Write code here
    
endmodule

// Full Adder using 2 Half Adders
module full_adder_struct (
    input  a, b, cin,
    output sum, cout
);
     wire s1,c1,c2;
   half_adder ha1 (
        .a(a),
        .b(b),
        .sum(s1),
        .carry(c1)
    );

    // Second half adder
    half_adder ha2 (
        .a(s1),
        .b(cin),
        .sum(sum),
        .carry(c2)
    );

    // Final carry
    assign cout = c1 | c2;
endmodule