9. The following data were obtained by observing a three-step job of a financial manager’s assistant. a. Using the data and an allowance of 10 percent of job time, determine a standard time for the operation. b. Determine the number of observations that would be required to estimate the mean time for the first element within 4 percent of the true value with a confidence of 98 percent. c. How many observations would be needed to estimate the mean time for element C to within 0.10 minutes of its actual value with a confidence of 90 percent?