The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.4 days and a standard deviation of 2.2 days. (a) What is the probability of spending more than three days in recovery? O 0.1377 O 0.8623 0 0.1431 0 0.7377 (b) The 90" percentile for recovery times is? 0 9.12 0 8.22 O 7.25 0 5.02