3) 6.3.4 According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg (Kuulasmaa, Hense & Tolonen, 1998). Assume that blood pressure is normally distributed. a) State the random variable. b) Find the probability that a person in China has blood pressure of 135 mmHg or more. Find the probability that a person in China has blood pressure of 141 mmHg or less. d) Find the probability that a person in China has blood pressure between 120 and 125 mmHg. e) Is it unusual for a person in China to have a blood pressure of 135 mmHg? Why or why not? f) What blood pressure do 90% of all people in China have less than