A set of final examination grades in an introductory statistics course is normally​ distributed, with a mean of 77 and a standard deviation of 8. Complete parts​ (a) through​ (d).       Question content area bottom Part 1 a. What is the probability that a student scored below 86 on this​ exam?   The probability that a student scored below 86 is enter your response here. ​(Round to four decimal places as​ needed.)   b. What is the probability that a student scored between 69 and 100​?   The probability that a student scored between 69 and 100 is enter your response here. ​(Round to four decimal places as​ needed.)   c. The probability is 15​% that a student taking the test scores higher than what​ grade?   The probability is 15​% that a student taking the test scores higher than enter your response here. ​(Round to the nearest integer as​ needed.)

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