The number of wiring packages that can be assembled by a company's employees has a normal distribution, with a mean equal to19.1per hour and a standard deviation of1.5per hour.

(a) What are the mean and standard deviation of the numberxof packages produced per worker in an 8-hour day? (Round your standard deviation to three decimal places.)

mean = _________

standard deviation = _________

(c) What is the probability that a worker will produce at least 156 packages per 8-hour day? (Round your answer to four decimal places.)