Adding the following methods:

removeOwner()
sortOwners()
listOwners()
petExists() * Still in process of working on petExists()
Finishing Ownership.java by adding the following:

Added the following methods:
petExists()
addPet()
removePet()
sortPets()
listPets()
closeOwnership()

Also, added in the test cases that I am expected to have certain output
from.
Removing test cases
Finishing Ownership.java by adding the following:

Added the following methods:
petExists()
addPet()
removePet()
sortPets()
listPets()
closeOwnership()