what's the code in python for this function?

Task You will implement some basic classes and methods to manage telephone plans. A Plan can have multiple Phone lines and include a record of multiple Caus. By calling the methods, someone could manage the lines of a plan and calculate the bill. Working through the classes in the given order is the simplest path to completion. class Phone: 0 def _init_(self, name, area_code. number, is_active): constructor of a telephone line: create/initialize instance variables for name, area_code, number and is_active (default value is True). Assume area_code is a three-digit integer with no leading 0/1; assume number is a seven-digit integer with no leading 0/1. - _str_: create/ return a string as in this example: "703-993-1530H(GMU)" - _eq_: determine if this object is equivalent to another. Two lines are considered equal if they have the same area code and the same number. - activate: set is_active of this object to be True. - deactivate: set is_active of this object to be False. class Call: - _init_(self, caller, callee, length): create/initialize instance variables. Assume caller and callee are Phone lines and that length is an integer. In case ofthe following errors, do not create any instance variables