a. What are the possible values of the random variable X? 2,4,5,6,7.8 (Use a comma to separate answers as needed.) b. Use random-variable notation to represent the event that the shuttle mission obtained has a crew size of 9. Select the correct A. O B. P c. Find P(X=6): interpret in terms of percentages. P(X= 6) -(Round to three decimal places as needed.) Interpret in terms of percentages. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or decimal rounded to one decimal place as needed.) OA. % of shuttle crews consist of exactly 6 people. O B. % of shuttle crews consist of at most 6 people. Oc. % of shuttle crews consist of more than 6 people. d. Obtain the probability distribution of X. List the possible values of X in ascending order, and their corresponding probabilities