Final grades for a class are approximately Normally distributed with a mean of 76 and a standard deviation of 8. A professor says that the top 10% of the class will receive an A, the next 20% a B, the next 40% a C, the next 20% a D, and the bottom 10% an F. What is the approximate maximum grade a student could attain and still receive an F for the course?

(a) 70

(c) 65.75

(e) 57

(b) 69.27

(d) 62.84