A marketing firm would like to test-market the name of a new energy drink targeted at 18- to 29-year-olds via social media. A study by the Pew Research Center found that 35% of U. S. adults (18 and older) do not use social media (Pew Research Center website, October 2015). The percentage of U. S. young adults age 30 and older is 78%. Suppose that the percentage of the U. S. adult population that is either age 18–29 or uses social media is 67.2%. a. What is the probability that a randomly selected U. S. adult uses social media? b. What is the probability that a randomly selected U. S. adult is aged 18–29? c. What is the probability that a randomly selected U. S. adult is 18–29 and a user of social media? Anderson, David R.. Essentials of Statistics for Business and Economics (p. 198). Cengage Learning. Kindle Edition.