20. In the following problem, check that is appropriate to use a normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities. It is estimated that 3.6% of the general population will live past their 90th birthday. In the graduating class of 752 high school seniors, find the following probabilities. (Round your answer to four decimal places.) a) 15 or more will live beyond their 90th birthday b) 30 or more will live beyond her 90th birthday c) Between 25 and 35 will live beyond their 90th birthday d) More than 40 will live beyond their 90th birthday