Modify the Code Fragment $1\mathrm{.}7\mathrm{.}1$ CreditCard class to include the following best practices in Java:

$1.$ Each class must be a subclass of something, if it is the superclass of the application, it must be a subclass of Java Object.

$2.$ Every class must be in a separate file.

$3.$ Create an application to test CreditCard class, and name it TestCreditCard or DemoCreditCard

$4.$ Each class must have an override toString$()$ to output the class info as a native Java Object

$5.$ Use this instead of naming parameters different from the class private members.

$6.$ Use ArrayList instead of the standard array for the wallet.

$7.$ Output credit cards with Balance $>200$

$8.$ Use Collection Sort to sort credit cards by Balance in Descending order.

$9.$ The application and its classes must have headers.