please solve above question for me.

4. Phone books show phone numbers under alphabetized la lines of String data, then provide the output as shown belov alphabetized under, the name in the format last, first, and t may assume that all user names to be input will be first the program, (650) area codes apply to Mountain View and Pa and San Jose. Don't worry about cities other than these. Y and does not require loops. Hint: find the space, or "", a of the last name. Sample run output (user input shown in bold): % java PhoneBook Enter name as first last: John Adams Enter city of residence: Mountain View Enter phone number (without area code): 123-4567 und The phone number will be alphabetized under A, 4. Phone books show phone numbers under alphabetized la lines of String data, then provide the output as shown belov alphabetized under, the name in the format last, first, and t may assume that all user names to be input will be first the program, (650) area codes apply to Mountain View and Pa and San Jose. Don't worry about cities other than these. Y and does not require loops. Hint: find the space, or "", a of the last name. Sample run output (user input shown in bold): % java PhoneBook Enter name as first last: John Adams Enter city of residence: Mountain View Enter phone number (without area code): 123-4567 und The phone number will be alphabetized under A,