Imagine that you have to store the marks obtained by your students. The number of subjects varies depending upon the subjects taken by each student. You need to calculate the average marks obtained by...

Imagine that you have to store the marks obtained by your students. The number of subjects varies depending upon the subjects taken by each student. You need to calculate the average marks obtained by a student in a given semester. Design and write a C++ implementation of an ADT Test Score that would store the marks obtained by a student. Also design functions to set and get the values stored.