A population of values has a normal distribution with =41.8 and =94.7. a. Find the probability that a single randomly selected value is less than 48.9. Round your answer to four decimal places. P(X<48.9)= b. Find the probability that a randomly selected sample of size n=64 has a mean less than 48.9. Round your answer to four decimal places. P(M<48.9)=.