Define a default constructor that initializes the fields renter $($string$),$ weekendPrice $($character$),$ and gasTank $($integer$)$ with the default values "Undefined", $\text{'}$N$\text{'},$ and $0,$ respectively.

Ex: If the input is Gus Y $87,$ then the output is:

Default values:

Renter: Undefined, Weekend price: N$,$ Gas tank: $0$

After mutator methods:

Renter: Gus, Weekend price: Y$,$ Gas tank: $87$