A taxi company has 4 taxicabs. Let X represent the number of taxicabs that are not working at any point in time. Consider the probability model shown below for X. x o 1_|2|34 x} 0.55 o.2|o.15|0.08 0.02 a. What is the probability that exactly 3 of the taxicabs are not working at any point in time? Give your answer to two decimal places. \\:i b. What is the probability tha. fewer than 3 of the taxicabs are not working at any point in time? Give your answer to two decimal places. :i c. What is the probability that more than 3 of the taxicabs are not working at any point in time? Give your answer to two decimal places. \\:i o'. What is the expected number of taxicabs that are not working at any point in time? Give your answer to two decimal places. \\:|