Number of Serious Errors Probability f(x) 0 0.07760 1 0.09171 2 0.41270 3 0.15873 4 0.17284 5 0.07407 6 0.01235 (b) What is the probability that a company has no serious errors in its financial statements? (Round your answer to five decimal places.) (c) What is the probability that a company has four or more serious errors in its financial statements? (Round your answer to five decimal places.) (d) What is the expected number of serious errors in a company's financial statements? (Round your answer to four decimal places.) (e) What is the variance of the number of serious errors in a company's financial statements? (Round your answer to four decimal places.) (f) What is the standard deviation of the number of serious errors in a company's financial statements? (Round your answer to four decimal places.)