Company Advertising ($ billions) Company Advertising (5 billions) A A 5.40 G 2.29 B 3.48 2.35 c 2.41 1 1.79 D 2.66 3 1.67 E E 2.24 K 2.36 F 2.44 L 1.58 (a) What the mean amount (in billion dollars) spent on advertising? (Round your answer to two decimal places.) $ 256 billion (b) What is the median amount (in billion dollars) spent on advertising? $ 238 billion (c) What are the first and third quartiles (in billion dollars)? first quartile $ billion third quartile $ billion