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PRACTICAL 17: HASHTABLES Activity 1 (Portfolio Task): Implement classes PhoneBookEntry, PhoneBook and User that provide the following functionality: Class PhoneBookEntry: Stores details of a phone book entry, including full name (i.e. both surname and name), phone number, email, and address Creates a human friendly representation of the class (i.e. toString()) Class PhoneBook: > Stores phone book entries in a map based on their details, where details are mapped as: "full name" "entry", namely phone book entries are stored in map of type: Map (note that duplicates of full names are not allowed) Phone book entries can be inserted (an entry for a new full name), updated (updating an entry for an existing full name) or deleted (deleting an entry for an existing full name) Prints the details of an existing entry (if present in the phone book) by searching the phone book based on a given full name (thus showing the corresponding number) Prints all entries within the phone book Class User: > Creates a phone book instance and subsequently inserts, updates, removes, and prints phone book entries Discuss your progress with your Tutor during practical sessions. What to include in your Portfolio: > Report: Describe in your report which parts of Activity 1 have been successfully implemented IntelliJ Project: Include your Java code for Activity 1 in your IntelliJ project under package "Practical_17