4- The prot from an additional worker is equal to which value? a. prot minus the worker's wage 1). cost plus the worker's wage c. revenue minus the worker's wage d. output minus the worker's wage 5- Rock Crushers Limited produces smaller rocks from larger rocks. As part of the production process, Rock Crusher Limited takes the below listed actions. Which is a capital irwestment? a. Covering the payroll for their rock crushing technicians. b. Purchasing large rocks and crushing them into smaller rocks. c. Storing suitany crushed rock for future sales. d. Making interest payments on their bonds