Please help solve the problem in the atachment

Use the fact that the variance of a Poisson distribution is 02 = p. The mean number of bankruptcies led per hour by businesses in a country was about ve. (a) Find the variance and the standard deviation. Interpret the results. (b) Find the probability that at most four businesses will le bankruptcy in any given hour. (a) The variance ls D (Round to three decimal places as needed.) The standard deviation is [I (Round to one decimal place as needed.) Choose the correct answer below. 0 A. The number of bankruptcies usually differs from the mean by no more than the standard deviation number of bankruptcies. O B. The number of bankruptcies always differs from the mean by no more than the standard deviation number of bankruptcies. O C. The number of bankruptcies differs from the standard deviation by no more than the mean number of bankruptcies. O D. The number of bankruptcies is always the standard deviation number of bankruptcies. (b) P(at most four) = D (Round to three decimal place as needed.)