A company has 6 service trucks. Let X represent the number of trucks that are not working at any point in time. Consider the probability model shown below for X. x lo 2|3|4| Probability 0.29I 0.2 0.17 0.06 0.28 a. What is the probability that exactly 3 of the trucks are not working at any point in time? Give your answer to two decimal places. ,p b. What is the probability that fewer than 3 of the trucks are not working at any point in time? Give your answer to two decimal places. - ,p c. what is the probability that more than 3 of the trucks are not working at any point in time? Give your answer to two decimal places. q d. What is the expected number of trucks that are not working at any point in time? Give your answer to two decimal places. - x e. What is the expected value of X2? Give your answer to one decimal place. 'I f. What is the variance of X? Give your answer to four decimal places. - x g. What is the standard deviation of X? Give your answer to four decimal places. 32.56 x