Get familiar with these files and read through the comments!

Implement getSize$()$ method $($size is the number of tickets currently present in the wallet$)$

Implement getLength$()$ method $($length is the capacity of the wallet $-$ maximum number of tickets our wallet can hold$)$

There is no method for removing a ConcertTicket from the wallet! Your job is to write that method. The method should be called remove. It should take no parameters, and it should return the most recently added ConcertTicket.