You are studying for your final exam of the semester. up to this point, you received 3 exam scores of 96%, 77%, and 74%. to receive a grade b in the class, you must have an average exam score between 80% and 89% for all 4 exams including the final.

find the widest range of scores that you can get on the final exam in order to receive a grade of b for the class. use interval notation.

a. [67, 100]
b. [73, 100]
c. [70, 71]