need help on 1&2 !! all letters pls

1. Data were collected on the number of operating rooms in use in Tampa General Hospital over a 30-day period. On 6 of the days only one operating room was used; on 9 days, two were used; on 11 days, three were used; and on 4 days all four rooms were used. a. Suppose a random variable x is defined as the number of operating rooms used. List all the possible values x can take and compute the corresponding probabilities. b. Compute the expected value of the number of operating rooms used. C. Compute the variance and standard deviation of the number of operating rooms used. 2. Scores on an endurance test for cardiac patients are normally distributed with u = 182 and o = 24. What is the probability a patient will score above 200? b. What percentage of patients score below 165? What score does a patient at the 80th percentile receive? a. C