Here is the question, I am wondering how to do the third one.

SAT scores are normally distributed with mean 1000 and standard deviation 106. a) For an individual chosen at random from all SAT takers, what is the probability that their score is 890 or less? Give your answer to three decimal places. Probability = 0.1497 y b) For a simple random sample of three individuals, what is the probability that their average SAT score is 390 or less? Probability = 0.0361 y c) For a simple random sample of three individuals, what is the probability that all three have scores below 890? Probability = 0.0361 X