The Sammg Distribution of the sample mean Given a normal distribution with p = 50 and o = 4, and given you select a sample of n = 100, complete parts (a) to (d). a. What is the probability that the sample mean, )_( is less than 49? P()_( 50.8) = E (Type an integer or decimal rounded to four decimal places as needed.) d. There is a 40% chance that the sample mean, )_( is above what value? m (Type an integer or decimal rounded to two decimal places as needed.)