Question #6 (12 points - 3 points each) Scores on Professor Combs' Statistics Final Exams have a long term history of being normally distributed, with a mean of = 70 and a standard deviation of = 7 a.) Find the probability that a single student will score above a 75 on the Final exam. b.) Find the probability that a single student will score between a 65 and 75 on the Final exam. c.) Find the probability that an entire class of 20 students will have a class average above a 75 on the exam. d) Find the probability that an entire class of 20 students will have a class average between 65 and 75 on the Final exam.