For this assignment, define a $$friendship$$ relation as a link between two persons. For example, the provided text file$$friends$.$txt lists all pairs of movie characters who appeared together in a scene of a Star Wars movie$1.$ We refer$$to any pair of characters who were listed together as $$friends$.$We can then ask queries about this set of friendship relations. For example, who is the most popular character,$$that is$,$ who appeared with the most other characters? Or$,$ for some specific character, how many others are within two$$degrees of separation$,$ that is$,$ who are friends of the character$$s friends?$$You will answer these questions with Python code, using appropriate data types to read, store and look up the given$$friendship relations.