Below is the program listing for which I would like to answer the questions from 1 to 4. It is not a working program. It is related to structural testing.

(a).Use structured programming constructs to draw the program graph

(b) Compute the cyclomatic complexity

(c) Determine a set of basis paths through the graph

(d) The test cases that will exercise the basis paths by determining the outcomes of the conditions at each of the predicate nodes in the program graph. Present the test cases in a table for easy understanding.

1. public static void main(String[] args) {

2. double a1 = 1.0;

3. double a2 = 2.0;

4. double a3 = 3.0;

5. if (c1) {

6. r1 = rate * 1.1;

7. r2 = rate * 2.1;

8. } else {

9. r3 = rate * 3.1;

10. r4 = rate * 4.1; }

11. while (c2) {

12. a5 = r1 * r3;

13. a6 = r2 * r4;

14. switch (c3) {

15. case 'A1':

16. a7 = a1 + a5;

17. a8 = a3 * a2;

18. break; // End Case A1

19. case 'A2':

20. s1 = a5 + a6 ;

21. s2 = s1 * a3;

22. if (c4) {

23. s3 = s2 * 1.5;

24. s4 = s2 * 2.0;

25. } else {

26. s3 = s2 * s1;

27. s4 = s2 * s2;}

28. break; // End Case A2

29. case 'A3':

30. s5 = a6 + a5 * a1;

31. s6 = a6 + * (a1 / a2);

32. break; // End Case A3

33. default:

34. System.out.println("Invalid");

35. } // End Switch

36. t1 = s3 * s4;

37. t2 = s3 * s5;

38. t3 = s4 * s6;

39. if (c5) {

40. t4 = t3 * 9.99;}

41. t5 = t1 + t2 ;

42. } // End While

43. System.out.println("Computation complete!");

44. }

Please help me answer all questions especially d part. I am not able to understand what to prvide in part d.