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 23% allowance for workers. (Round all intermediate calculations to two decimal places before proceeding with further calculations.) Element Grasp and place bag Performance Rating Observation (seconds) 1 2 3 4 5 105% 7 8 7 11 6 Fill bag Seal bag 80% 35 40 39 34 112* 105% 14 17 13 19 17 Place bag on conveyor 95% 8 6 9 30^ 36^ * 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 = 80.36 seconds (round your response to two decimal places). b) The number of observations that are required for a 95% confidence level within 5% accuracy = observations (round your response up to the next whole number).