Using R script Write a program implement a simple Phone Book The goal is to create an end-user application that users can use to manage friend's data and contact information You are the developer of the application, not the user There are many friends Sometimes you make new friends Sometimes you unfriend someone For each friend we want to remember Last name First name Phone number Implement the following functionality: Print a friend's info Print the whole telephone book Insert a friend's info Delete a friend's info Look-up a friend's info Use only vectors and simple data types (e.g. text, numeric)