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;
    
endmodule

// Full Adder using 2 Half Adders
module full_adder_struct (
    input  a, b, cin,
    output sum, cout
);
    wire s, c, carry;
    half_adder u1 (.a(a), .b(b), .sum(s), .carry(c));
    half_adder u2 (.a(s), .b(cin), .sum(sum), .carry(carry));
    assign cout = c|carry;
endmodule