In the production of a particular labor-intensive item, it is anticipated that a(n) 93% learning curve will be in effect. If the first unit will require 5,052 hours, how many hours will the 4th unit require? (Round to 2 decimal places and report only the number.) We have observed a learning curve being in effect in the production of a given item. The first unit required 800 hours, and the second required only 720 hours. If this pattern holds, how many hours will be required for the 8th unit? (Round to 2 decimal places and report only the number.) Suppose that a(n) 80% learning curve is in effect and that the time required to produce the first unit is 4,667 hours. How many hours, total, will be required to produce 5 units? (Round to 2 decimal places and report only the number.)