Part A) A firm has a contract to make 10 specialty lenses for night vision equipment. The first one took 100 hours. Learning is expected at the 80% rate. How long will it take to finish all 10 units? (round it to the nearest whole number)

Part B) Afirm has a contract to make 10specialty lenses for night vision equipment. The first one took 180 hours. Learning is expected at the 90% rate.How long will it take to finish the 10th unit?(round it to the nearest whole number)

Part C)The first unit took 100 hours and the fourth unit took 75 hours to complete. What is the learning curve (%)?(round it to the nearest whole number)

Part D)It took 200 hours to make the first unit of a product. After the second and third units were made, the learning curve was estimated to be 75%. At $40 per hour, what is the total labour bill for all four units? (round it to the nearest whole number)