Java coding help

Using the following method write an code for its function:

public void addAnimal(Animal a)

This method adds an animal at the next available slot. It will use the helper method resizeAnimalArray() to double the the array when there are no more available slots before adding the Animal to the array

public Animal removeAnimal(int index)

This method will remove the element at the specified index by shifting all elements at greater indexes down If an invalid index is passed as a parameter nothing will be removed

Parameters:

index - The index of the Animal to remove from the array

Returns:

The Animal object removed from the specified index