Design a class named Pet, which should have the following fields:

$$ name. The name field holds the name of a pet.

$$ animal. The animal field holds the type of animal that a pet is$.$ Example values are $$Dog$,$Cat$,$ and $$Bird$.$

$$ age. The age field holds the pet$$s age.

The Pet class should also have the following methods:

$$ setName. The setName method stores a value in the name field.

$$ setAnimal. The setAnimal method stores a value in the animal field.

$$ setAge. The setAge method stores a value in the age field.

$$ getName. The getName method returns the value of the name field.

$$ getAnimal. The getAnimal method returns the value of the animal field.

$$ getAge. The getAge method returns the value of the age field.

a$.$ Write the Java program for the Pet class. The PetDemo class should create $3$ Pet objects. For one object, pass all three arguments. For second object, pass $2$ arguments $($name$,$ animal$).$ For third object, pass no argument. For objects missing a value, use setters to set the values.

b$.$ For age, the setters should be able to accept int, long, or String.

c$.$ Display values in all three objects

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