6	Use the following data for problems 6.a and 6.b. A community college instructor finds that his students score on an exam is normally distributed with a population mean = 83 and population standard deviation = 5.
6.a	The instructor wants to pass 95% of the class. What should be the minimum passing grade?
6.b	The instructor wants to give As to 30% of his students. What should be the minimum grade for an A?