1. (6 points) The following data represent the number of cars passing through a toll booth during a certain time period over a number of days. Show your work for all parts below. 35 40 43 42 37 39 42 38 a) Find the median b) Find Q3 c) Find the percentile corresponding to 42 cars. 2. (4 points) Find the mean of the frequency distribution below. Class Frequency 1-7 5 8-14 12 15-21 3 3. (4 points) Find the standard deviation of the sample data set below. Use the formula and show your work. 3 5 6 10