pl/sql block

Q.1(A) Create following table with proper constraints, primary key. Insert at least 10 records in each table. 1.Custmast(custID, cname,city,phoneno) 2.Billmast(billno,custID, bill_date, bill_amt) Q.1(B) Write a PL/SQL block to give 20% discount on bill amount more than Rs. 3200. Else give 5% discount and display the details.