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 imm1, imm2, imm3;
    half_adder inst1(.a(a), .b(b), .sum(imm1), .carry(imm2));
    half_adder inst2(.a(imm1), .b(cin), .sum(sum), .carry(imm3));
    assign cout = imm2 | imm3;
endmodule