How much do Americans living in or near cities spend waiting in traffic, and how much does waiting in traffic cost them per year? The file Congestion includes this cost for 31 cities. (Source: Data extracted from: The High Cost of Congestion," Time, October 17, 2011, p.18.) For the time Americas living or near cities spend waiting in traffic and the cost of waiting in traffic per year: a. Compute the mean, median, first quartile, and third quartile. (4 Marks) b. Compute the range, interquartile range, standard deviation, and coefficient of variation. (4 Marks) c. Compute the correlation coefficient between compensation and the investment return in 2009