Please show your work. a.) The standard time for this process = ____ seconds (round your response to two decimal places). b.) The number of observations that are required for a 90% confidence level within 5% accuracy = ____ observations (round your response to the next whole number).

The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling activity are shown in the following table. Because of the high physical demands of the job, the company's policy is a 20% allowance for workers. (Round all intermediate calculations to two decimal places before proceeding with further calculations.) 5 Element Grasp and place bag Fill bag Seal bag Place bag on conveyor Performance Rating 105% 85% 110% 90% 1 7 35 15 9 Observation (seconds) 2 3 4 8 8 10 41 38 35 17 14 20 5 9 301 8 110* 17 341 * Bag breaks open; included as delay in the allowance factor * Conveyor jams; included as delay in the allowance factor a) The standard time for this process = seconds (round your response to two decimal places)