Aveterinarian services many pets and their owners. as new pets are added to the population of pets being serviced, their information is entered into a flat text file. each month, the vet requests a listing of all pets sorted by their outstanding bill balance. you have to write a program to produce a report of animals and their owners sorted by their outstanding bill balances from the data in the flat text file. below is a description of the information on the text file:

the first entry is the number of animals on the file (numeric)

the fields below repeat for each animal:

o owner name (string) o birth year (numeric) o bill balance (numeric) o species (string)

o special feature (numeric or string)

the animals serviced by the veterinarian are of two types: mammals and non-mammals. for a mammal the special feature field on the flat file is the number of legs of the animal (numeric). for a non-mammal the special feature field is the blood type, warm-blooded or cold-blooded (string).

program requirements and grading:

from the information provided, write a solution that includes the following:

a suitable inheritance hierarchy which represents the pets serviced by the veterinarian. it is up to you how to design the inheritance hierarchy. i suggest an animal class and appropriate subclasses.

for all classes include the following:

o instancevariables

o constructors

o access or and mutator methods

o suitable tostring() methods

write a class _program7 which utilizes the following:

o an array of animal objects

o a method which reads the input file provided and stores the objects in the array

of animals.

o the input file provided, program7.txt, to test your program.

o a method which sorts the array of animals in ascending order by the balance.

o a method that formats and prints the output report. there should be one a nimal per line and at most 40 animals per page,

o the main metho d will call all the other methods which will:

▪ read the text file and store the objects in the array

▪ sort the objects

▪ format and print the report