27. Let x be a random variable that represents white blood cell count per cubic milliliter of whole blood. Assume that x has a distribution that is approximately normal, with mean ? = 8050 and...

27. Letx be a random variable that represents white blood cell count per cubic milliliter of whole blood. Assume thatx has a distribution that is approximately normal, with mean ? = 8050 and estimated standard deviation ? = 2850. A test result ofx < 3500 is an="" indication="" of="" leukopenia.="" this="" indicates="" bone="" marrow="" depression="" that="" may="" be="" the="" result="" of="" a="" viral="">

(a)
What is the probability that, on a single test,x is less than 3500? (Round your answer to four decimal places.)

(b)
What is the probability of x < 3500?="" (round="" your="" answer="" to="" four="" decimal="">

(c) Repeat part (b) forn = 3 tests taken a week apart. (Round your answer to four decimal places.)