The data show the hourly earnings (in dollars) of a sample of 25 railroad equipment manufacturers. Use technology to answer parts (a) and (b). 15.65 18.80 14.60 15.80 14.40 13.90 17.45 17.55 13.85 14.15 19.05 15.40 15.25 19.45 15.90 16.55 16.35 15.25 15.10 19.05 15.15 16.30 17.75 18.40 15.30 a. Find the data set's first, second, and third quartiles. Q1 = Q2 = Q3 (Type integers or decimals. Do not round.) b. Draw a box-and-whisker plot that represents the data set. Choose the correct answer below. Note that different technologies will produce slightly different results. X O B. * c. Q Q 12 15 18 21 12 15 18 21 12 15 18 21