Suppose that the time taken to download a file of a certain kind onto a computer has an expected value of 22 minutes and a standard deviation of 1.8 minutes. If a technician needs to download five of these files onto a computer one after the other, and the downloading times are independent of each other, what are the expected value and the standard deviation of the total time taken to download all five files? What are the expected value and the standard deviation of the average downloading time of the five files?