A population of values has a normal distribution with u = 276 and o = 6.5. You intend to draw a random sample of size n = 10. First calculate z, round it to two (2) decimal places, then use the rounded z-score to determine the required probability accurate to four (4) decimal places. 1. Find the probability that a single randomly selected value is greater than 279.3. P(x > 279.3) = 2. Find the probability that a sample of size n = 10 is randomly selected with a mean greater than 279.3. P(a > 279.3) =