The final grade of Jose in this class is converted from a numerical average score calculated by the formula:S= 60%T+ 40%E, where T = the average of the three in-class test and E = the score on the final exam. There was a chance to 20% of an extra Work (Review Ex.-Ch.6)added to the Test No.2 when a student scored below 90. So far, Jose's three in-class test scores are: T₁= 86, T₂= 57, Extra Work = 90, and T₃=73.

(a)If his score for the final exam is 76, what is the final average score for him?

(b)What score,E(range of 0100), should Jose obtain on the final exam in order for him toreceive a letter gradeBor better (Numerical average80)?

(c)Is it possible for Jose to receive a gradeA(Numerical average93)? why or why not?