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21. The distribution of white blood cell count per cubic millimeter of whole blood is approximately Normal with mean 7550 and standard deviation 1740. Use a technology or a table to answer parts a through c below. For each include an appropriately labeled and shaded Normal curve. a. What is the probability that a randomly selected person will have a white blood cell count between 6000 and 10,000? Select the correct graph below. O A. O C. 6000 OC. 10,000 6000 2330 7550 12770 O C. 10.000 2 10,500 TRILE → 2330 7550 12770 10,500 2330 7550 12770 OB. 4500 330 7550 12770 O D. 4500 2330 7550 12770 2 2330 7550 12770 The probability that a randomly selected person will have a white blood cell count between 6000 and 10,000 is %. (Round to one decimal place as needed.) O B. b. An elevated white blood cell count can be a sign of infection somewhere in the body. A white blood cell count can be considered elevated if it is over 10,500. What percentage of people have white blood cell counts in this elevated range? Select the correct graph below. O A. O D. 6000 2330 7550 12770 OB. 6000 2330 O D. The percentage of people who have white blood cell counts over 10,500 is (Round to one decimal place as needed.) 10,000 Do 10,000 c. A white blood cell count below 4500 is considered low. People in this range may be referred for additional medical testing. What is the probability that a randomly selected person has a white blood cell count below 4500? Select the correct graph below. O A. z 7550 12770 4500 10,500 T 2330 7550 12770 4330 10,500 2330 7550 12770 TT 7550 12770 4500 2330 7550 12770 %. The probability that a randomly selected person has a white blood cell count below 4500 is (Round to one decimal place as needed.) %.