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 ha0(a,b,s1,c1);
 half_adder ha1(s1,cin,sum,c2);
 assign cout=c1|c2;   // Write code here
endmodule