The amounts of time per workout an athlete uses a stairclimber are normally distributed, with a mean of 21 minutes and a standard deviation of 6 minutes. Find the probability that a randomly selected...

Extracted text: The amounts of time per workout an athlete uses a stairclimber are normally distributed, with a mean of 21 minutes and a standard deviation of 6 minutes. Find the probability that a randomly selected athlete uses a stairclimber for (a) less than 16 minutes, (b) between 21 and 29 minutes, and (c) more than 30 minutes. stairclimber for less than 16 minutes is (a) The probability that a randomly selected athlete uses (Round to four decimal places as needed.) (b) The probability that a randomly selected athlete uses a stairclimber between 21 and 29 minutes isO (Round to four decimal places as needed.) (c) The probability that a randomly selected athlete uses a stairclimber for more than 30 minutes is (Round to four decimal places as needed.)