Which pattern it is?

Answer the rest of the questions using the following scenario. You have a software product, in which there exists a number of Customers objects that contain a collection of customers. Some examples of these collections can be Young Customers, Middle Aged Customers etc. that contain a collection of customers that belong to a certain group. Client code may need to sort these collection objects according to the last names of the customers. One specific requirement is any particular collection can be sorted using a specific sort algortim. Moreover, this sort algorithm can be changed later for any collection. As an example, assuming that in this system we have BubbleSort, Quick Sort and Merge Sort; if a particular collection such as Young Customers is initially designed to be sorted using BubbleSort, at a later time it should be possible for YoungCustomers to switch to QuickSort instead. Your task is to select a design pattern suitable for this scenario and implement a design. In this scenario, focus only on the software design instead of the function. Therefore, do not try to implement the actual sort algorithms. It is enough for your sort procedures to just display a message along the lines of "collection is sorted using xyz algorithm