19. A large software development firm recently relocated its facilities. Top management is interested in fostering good relations with their new local community and has encouraged their professional employees to engage in local service activities. They wish to determine the average number of hours the firm's professionals volunteer per month. A random sample of 34 professionals yields a mean of 16.6 hours and a standard deviation of 2.22 hours. Construct a 95% confidence interval for the average number of hours the firm's professional volunteer per month. Show your work. (Spts)