The following program contains errors and incomplete. a) Identify the errors by stating the line number together with the correct codes. b) What is the output of the program after all the corrections are made? 1. 2. #include using namespace std; 3. 4. int main() { int number; number.push front (10); number.push back (20); number.push_back (30); 6. 7. 8. 9. 10. 11. 12. vector ::iterator itr = begin(); cout