Answer
8:
Explanation:
Firstly, we can see that the average number of quarters she is to complete is 7.
Since we have 4 quarters to complete, the total quarters she is to complete is 4 * 7 = 28 quarters. It means that the total number of quarters she is required to complete to stay on the financial aid is 28
Now, she has completed the following 5,7,8 quarters. To stay on the financial aid after the last quarter, she has to complete the following: 28 -5-7-8 = 8 quarters