Part 2 of 4 Points 3 of 12 COLE 5 of 100 points Full time college students report spending a mean of 23 hours per week on academic activities both inside and outside the classroom Assume the standard deviation of time spent on academic activita hours Complete parts a through d below a If you select a random sample of 16 full time college students what is the probability that the mean time spent on academic activities is at least 21 hours per week 0 9962 Round to four decimal places as needed b If you select a random sample of 16 full time college students there is an 81 chance that the sample mean is less than how many hours per week Round to two decimal places as needed O