There is a class called roster whose constructor takes a list of tuples with the names of students and their grades in the class, for example -- [('richard', 98), ('benny', 55), ('katie', 87), ('sally', 76)].
create an instance of the roster class, including the following students and their respective grades, and store it in the variable mathclass: jacob, 65 frankie, 86 lina, 94 arnold, 63 amanda, 87

mathClass = Roster([('Jacob', 65), ('Frankie', 86), ('Lina', 94), ('Arnold', 63), ('Amanda', 87)])

Explanation:

An Instance of a class, refers to making a new object of that class. They belong to the class from which they are derived. The meaning of this is that every instance of a class that is created, will have its own set of variables with different values initialized by the constructor call, so we can make several objects of a class and define their behavior. In this question, we are asked to make a new instance of the class Roster called mathClass and at the constructor call we pass the variables of this new object as an argument.  

answer; peter zenger;