A consumers group recently tested 100 compact fluorescent light bulbs and recorded their lifetimes. The chart shows the results. Lifetime (h) Frequency 5000-6000 7 6000-7000 12 7000-8000 34 8000-9000 27 9000-10 000 10 10 000-11 000 8 11 000-12 000 2 a) Make a box and whisker plot of the data. b) Make a histogram of the data and mark the quartiles on it. c) Describe the middle 50% of the data. d) Identify any outliers