Oder the following functional dependencies in a database. Date of Birth->Age Course 77298me>Roll mmber 2022107102 relation A(Roll_mmber, Name, Date of birth, Age) is in which of the following ZNF. 3NF or BCNF or None? Reason how? (2 marka) b) Consider the following R (A, B, C, D, E, F, G, H) with the following dependencies Roll number Name tr>Coume _name Course number Instructor Course_number)->Grade ABCD AD E EFG H FGH (1) Based on these functional dependencies, there is one minimal key for R. What is it? (2 marks) (ii) One of the four functional dependencies can be removed without altering the key. Which one is it? (2 marks)