Here is the access files link:

https://drive.google.com/drive/folders/174ET4kpuJG3W4g29PbQfo9QMDblAt2-j?usp=sharing

EXERCISE #2 Please complete the following exercises and submit them in Blackboard under Homework 7E2. I. Using the AbstractBag classes as an example, describe the purpose of an abstract class, and explain why no instance of it would ever be created. 2. The methods_init_, isEmpty,_len_str_eq_, count, and_add_ are defined in the AbstractCollection class. Which of these methods might be redefined in subclasses, and why? Two methods are not defined in the AbstractCollection class but must be defined in its subclasses for its other methods to function properly. Which methods are these? 3. The method add is called within the code for methods _init_ and_add_ in the ArrayBag class, but it is not defined in that class. To which class does this method belong, and how does Python locate its implementation? 4