a) The standard time for this process = ? seconds (round your response to two decimal places).

b. how many observations are necessary for 99% confidence, within 5% accuracy?

please answer both parts to the one questions, thanks

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.) Element Grasp and place bag Fill bag Seal bag Place bag on conveyor Performance Rating 110% 90 % 100% 85% 1 9 36 14 7 Observation (seconds) 2 3 4 10 9 11 42 40 35 17 14 21 7 10 314 5 7 114 18 34 * 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)