4. We can also use our knowledge of Normal distributions and R to calculate values that cut-off specific probabilities. Using the function qnorm (probability, mean = MU, sd = SIGMA, lower.tail = TRUE) A. What value of the Z distribution cuts off a probability equal to 0.1 in the upper tail? B. What value of the Z distribution cuts off a probability equal to 0.01 in the upper tail? C. For the population of people between the ages of 3 and 74 who participated in the National Health Interview Survey, the distribution of hemoglobin levels has mean = 13.3 g/100ml and standard deviation 1.12 g/100ml. What hemoglobin level would put a person in the bottom 5% of participants?