Q18) (15 points] Please answer these questions based on the following function "calculate a) 1S points] Draw the corresponding Flow Graph G b) I5 points) Calculate cyclomatic complexity VIG) and write all independent paths c) [S points) Prepare the test cases for basis path testing return -1 return -1 int ts (b > a) t 10 12 13 while It T0) 15 16 b-t: 18 19 1 return b