The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). The mean maximum oxygen uptake for elite athletes has been found to be 68.5 with a standard deviation of 7.5. Assume that the distribution is approximately normal. a) Find the probability that an elite athlete has a maximum oxygen uptake of at least 90.3 ml/kg.
b) Find the probability that an elite athlete has a maximum oxygen uptake of at most 59.5 ml/kg.
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