Which companies spend the most money on advertising? A news website maintains a list of the top-spending companies. In 2014, Company A spent more than any other company, a whopping $4.60 billion. In second place was Company B, which spent $2.98 billion. The top 12 companies and the amount each spent on advertising in billions of dollars are as follows. Advertising Advertising Company ($ billions) Company ($ billions) A 4.60 G 2.59 B 2.98 H 2.05 C 2.71 T 2.49 D 2.46 J 2.37 E 2.94 K 2.06 F 1.84 2.18 (a) What is the mean amount (in billion dollars) spent on advertising? (Round your answer to two decimal places.) $ billion (b) What is the median amount (in billion dollars) spent on advertising? $ billion (c) What are the first and third quartiles (in billion dollars)? first quartile $ billion third quartile $ billionThe following times were recorded by the quarter-mile and mile runners of a university track team (times are in minutes). Quarter-Mile times 0.92 0.98 1.03 0.91 0.98 Mile times 4.52 4,45 4.50 4,70 4.60 After viewing this sample of running times, one of the coaches commented that the quarter-milers turned in the more consistent times. Use the standard deviation and the coefficient of variation to summarize the variability in the data. Compute the sample standard deviation (in min) for quarter-mile runners and one-mile runners. (Round your answers to four decimal places.) quarter-mile runners min one-mile runners min Compute the coefficient of variation for quarter-mile runners and one-mile runners. (Round your answers to one decimal place.) quarter-mile runners one-mile runners Does the use of the coefficient of variation indicate that the coach's statement should be qualified