13. In the software development life cycle name the type of main tests used and who is doing these testing. Sort the tests from the start of the software development to the completion of the software. 14. A switch closes itself when the temperature is lower than 18 and the switch is back on when it is more than 21. Identify all equivalence values for this statement. 15. Given the following code, calculate statement and branch coverage. IFA >B THEN C = A-B ELSE C=A+B ENDIF Read D IF C = D Then Print "Error" ENDIF