Question: Please solve it by Python Write a function mutual_friends(list1,list2) that takes two lists of friends and returns the number of friends in common. Use sets.

Please solve it by Python

Write a function mutual_friends(list1,list2) that takes two lists of friends and returns the number of friends in common. Use sets. Your problem should behave as follows:

>>> mutual_friends(["Bob","Joe"],["Esmerelda"])

>>> mutual_friends(["Bob","Joe"],["Bob","Joe"])

>>> mutual_friends(["Bob","Joe"],["Bob","Joe","Keitha"])

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