Create a interface called Customer which should have the methods calculatePreferredPoints, calculateCustomerDiscount.

Implement this interface in a new class called Promotions. Write the override method $-$ calculatePreferredPoints to return a random points in integer. $($Use Random Class method to from Java Library$)$ Write the override method calculateCustomerDiscount to take the parameter of points and amount. calculate discount if points is more than $10$ then return $50\%$ else return $10\%$

Use your imagination to write an app to instantiate and use promotion class.