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
    assign sum=a^b;
    assign 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 w1,c1,c2;
    half_adder m1(.a(a),.b(b),.sum(w1),.carry(c1));
    half_adder m2(.a(w1),.b(cin),.sum(sum),.carry(c2));
    assign cout=c2|c1;
endmodule