Need some assistance please.

9. Let X (%) be the annual return on the total stock market. Assume that the mean of X is 10 (%) and the variance is 16. (a) (8 points) Use Markov's inequality to find an upper bound for the probability of more than a 20 (76) annual return. (b) (8 points) Use Chebyshev's inequality to find an upper bound for the probability of more than a 20 (%) annual return. Page 7 10. (10 points) Researchers doing a study comparing time spent on social media and time spent on studying randomly sampled 200 students at a major university. If all the students at the university in fact spent 2.2 hours per day on studying, with a standard deviation of 2 hours, what is the probability of getting a sample average of 1.8 or less