Part 2 Question 1 What is the difference between a class and an object? Explain with words, provide an example, and show which one is the class and which one is the object. Value: 10/100 Question 2 You are given the following data structure: struct final { unsigned short grade1; string questioni, question2; unsigned short grade2, grade3; string question3; }; Complete the following function, in which you will return the overall grade as the sum of each grade. unsigned short calculateOverallgrade (final f) { // write code here } Value: 5/100 Question 3 How would you change the data structure in Question 2 to optimize its size in memory? And why? Value: 5/100