Consider the following method 1.double calculateBill(int usage){ 2. double bill = 0; 3. if (usage > 0){ 4. bill = 40; 5. } 6. if (usage > 100){ 7. if (usage <= 200){ 8. bill += (usage100) * 0.5; 9. } 10. else{ 11. bill += 50+(usage-200) * 0.1; 12. if (bill >= 100){ 13. bill = bill * 0.9; 14. } 15 } 16. return bill; 17. } Select all the statements that are true Question 3 options: (1,4) is a DU pair for "usage" The use of "bill" in line 13 is a p-use The use of "usage" in line 8 is a c-use (4,8) is a DU pair for "bill" (12,13) is a DU pair for "bill"