1)Write a PL/SQL to Reverse of a Number 2)Write a PL/SQL to Factorial of a number 3) Write a PL/SQL to update the rate field by 20% more than the current rate in inventory table which has the following fields: Prono, ProName and Rate. After updating the table a new field (Alter) called for Number of item and place for values for the new field without using PL/SQL block.