Current research indicates that the distribution of the life expectancies of a certain protozoan is normal with a mean of 48 days and a standard deviation of 10.5 days. Find the probability that a simple random sample of 36 protozoa will have a mean life expectancy of 51 or more days. a)0.0432 b)0.9568 c)0.2432 d)0.6125 e)0.0865 f)None of the above