Please help me with this question, the answer has to be in Python 3.x. I dont know where to begin or how to do it. Thanks!

7. The following problems relate to an email messaging system: Design a class Message that models an e-mail message. A message has a recipient, a sender, and a message text. Support the following methods: A constructor that takes the sender and recipient A method append that appends a line of text to the message body A method toString that makes the message into one long string like this (notice that each line is in a new line): "From: Harry Morgan To: Rudolf Reindeer Design a class Mailbox that stores e-mail messages, using the Message class from before. Implement the following methods: def addMessage(self, message) - def getMessage(self, index) - def removeMessage(self, index) Write a short program that uses the Message and Mailbox classes by making a Message, printing it and storing it in a Mailbox