On Java using Notepadd ++

Applying the techniques of decomposition (refer to pp 425-426), how would you break this program/problem into smaller pieces. Design an address book program to keep track of the names, addresses, phone numbers, and birthdays of family members, close friends, and certain business associates. Your program should be able to handle a maximum of 500 entries. This program should include the ability to load address book data from a file, sort by last name, search by last name, print all information for a given person, print the name of people whose birthdays are in a given month, and print the names of all people between two last names