A method you have to add, however, is the count$\_$duplicates method which takes only self as an argument and returns an integer. This will be highly dependent on your correct implementation of Person.$\_\_$eq$\_\_().$ The count duplicate $($as given by the name$)$ should count how many of its elements are the same. For example, if we have the list $[$a$,$ b$,$ a$,$ a$],$ the count of duplicates is $1($even if the value a was observed three times, we say that a itself has a duplicate thus the count is $1).$ In your case, you will be considering a person's object instead of the letters a or b