help... please

Question 19 (1 point) The scores on a history exam have a normal distribution with a mean score of u " 91.6 and a standard deviation of o - 14.3. If 20 people take the exam, find the probability that the mean of their scores is over 95. 0.5948 0.1446 0.4052 0.8554 Question 20 (1 point) A rechargable laptop battery lasts for a mean duration of p = 5.1 hours with q = 1.2 hours. If 15 batteries are charged and tested, find the probability that their mean duration is less than 4.7 hours. 0.0985 0.6293 0.9015 0.3707