What do you understand by software testing? [2 marks] Why is testing very important in software development process? Give and briefly explain at least three points. 16 marks] What is the difference between software verification and software validation? [4 marks] d) One of the testing techniques used by testers is black box testing, briefly explain how this kind of testing is done. Briefly explain what you understand by software maintenance testing? 14 marks] 14 marks]