You have the following students in Statistics with the following final raw averages:

53, 82, 86, 83, 56, 93, 71, 91, 75, 88, 69, 78, 64, 74, 81, 84, 77, 90, 85, 64, 79, 71, 65, 66 and 83.

Assume that we have the following five grades:A, B, C, D and F.So, there are 5 classes or classifications of grades:A, B, C, D and F.

Answer the following scenario:

1. If I am the student that scored the average of 84, what decile of the class would I rank?
2. If I am the student that scored the average of 83, what quartile of the class would I rank?
3. What is the midpoint of Class C?
4. What is the Commulative Frequency of those in the class with D and F grades?(They might be repeating this class!)