15 and 16 please

Question 15 5 pts The manager of a computer retail store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.2 years and a standard deviation of 0.6 years. He then randomly selects records on 47 laptops sold in the past and finds that the mean replacement time is 4.1 years. Assuming that the laptop replacement times have a mean of 4.2 years and a standard deviation of 0.6 years, find the probability that 47 randomly selected laptops will have a mean replacement time of 4.1 years or less. Give your answer to 4 decimal places. Question 16 5 pts The television show Lett3rs has been successful for many years. That show recently had a share of 21, meaning that among the TV sets in use, 21% were tuned to Jett3rs. Assume that an advertiser wants to verify that 21% share value by conducting its own survey, and a pilot survey begins with 10 households have TV sets in use at the time of a Lett3rs broadcast. Find the probability that at least one of the households are tuned to Lett3rs. Round your answer to 4 decimal places