Solve parts a, b, and c by hand. Solve part d on Excel. Recently, an automotive supplier sold one of its facilities to another company. The new company replaced the assembly line with a new crew of workers. The new crew took 3.7 work hours to assemble the 3rd unit, and 3.3 work hours to assemble the 6th unit. a. Find the learning curve exponent. b. Find the learning rate. c. Estimate the amount of required to manufacture the 15th unit. d. Estimate the total time required to complete a 345 unit order.