Richard Dulski's firm is about to bid on a new radar system. Although the product uses new technology, Dulski believes that a learning rate of 75% is appropriate. The first unit is expected to take 680 hours, and the contract is for 15 units. a) The total amount of hours to build the 15 units 4976.92 hours (round your response to the nearest whole number). b) The average time to build each of the 15 units = 331.8 hours (round your response to two decimal places). c) If a worker works 2,080 hours per year, the number of workers required to complete this contract in a year = to two decimal places). workers (round your response