Pharmacy(patient_id, patient_name, address, (Rx_num, trademark_name, generic_name, (filldate, num_refills_left), num_refills)) Functional Dependencies: • patient_id ⟶ patient_name, address • patient_id, Rx_num ⟶ trademark_name, generic_name • Rx_num ⟶ num_refills • Rx_num, filldate ⟶ num_refills_left a) Is this relation in 1NF? If not, write an explanation of why it isn’t, then make the necessary changes to fix it. b) Is this relation in 2NF? If not, write an explanation of why it isn’t, then make the necessary changes to fix it. c) Is this relation in 3NF? If not, write an explanation of why it isn’t, then make the necessary changes to fix it.