Annual sales, in millions of dollars, for 21 pharmaceutical companies follow 8,508 608 1,274 1,972 8,879 2,359 11,413 14,138 6,352 1,950 2,918 1,256 10,3987,478 4,119 4,441 839 2,2273,753 5,694 8,405 BOB (a) Provide a five-number summary (in million dollars) minimum million dollars first quartile 4019 x million dollars median 4019 x million dollars third quartile 8305 x million dollars maximum 14138 million dollars (b) Compute the lower and upper limits (in million dollars). lower limit -7777.50 x million dollars 17954,50 X million dollars upper limit