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Pls answer asap!

Q22) When dealing with a three-tier application 1. Changing the database layer has no effect on the business layer 2. The database layer is dependent on the business layer 3. Changing the business layer has no effect on the database layer. 4. Sometimes an authentication layer exists beneath the business layer. 5. Changing the presentation layer will require the database layer to be retested Q22) Q23) The following is never done by developers 1) Black Box Testing 2) White Box Testing 3) Unit Testing 4) Network Testing 5) Release Testing Q23) Q24) The following are good ways to test software (note: There may be more than one answer) 1) test with edge values 2) test with unexpected values 3) test with empty sets of data 4) using only developers to test 5) use automated tests Q24)