cores on Professor Combs' Statistics Final Exams have a long term history of being normally distributed, with a mean of = 74 and a standard deviation of = 8 a.) Find the probability that a single student will score above a 79 on the Final exam. b.) Find the probability that a single student will score between a 69 and 79 on the Final exam. c.) Find the probability that an entire class of 20 students will have a class average above a 79 on the exam. d) Find the probability that an entire class of 20 students will have a class average between 69 and 79 on the Final exam.