Ameal plan consists of the name of a meal, together with a selection of foods and the number of calories in each food. define a mealplan class, write a docstring for the class, and define the following three class methods: 1. an initialization method. the initialization method should:  take a string parameter, name, and assign it to the instance attribute name of the meal plan being created  create an instance attribute named foods for the meal plan being created and initialize it to the empty dictionary 2. a method named addfood. the method addfood should take two parameters:  a string, food  an int, calories the method addfood should add food as a key in foods and calories as its value. 3. a method named getcalorie