Write PL/SQL codes for: a) Print "sum" and "product" of all odd numbers between "n1" and "n2", where, "n1" and "n2" are the parameters. b) Fetch and display records of those "Accounts" which title begins with the letter "J". (Accounts table given in Q#4) c) Create trigger to store deleted account records in the table "Closed_accounts". d) Create trigger to automatically assign value to the column "Acc_value" at the time of insertion. Criteria is as under: If Acc_title begins with letter "I": Acc_value = 1000; If Acc_title begins with letter "J": Acc_value = 10000; If Acc_title begins with letter "B": Acc_value = 50000; If Acc_title begins with letter "V": Acc_value = 100000;