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 67 with a standard deviation of 8.1. Assume that the distribution is approximately normal. Find the probability that an elite athlete has a maximum oxygen uptake of at least 85.6 ml/kg. Find the probability that an elite athlete has a maximum oxygen uptake of at most 49.2 ml/kg.