An Accounting firm performs audits which involve four steps. Planning: gathering documents and establishing a timeline. Fieldwork: Conducting the investigation; the core phase. Reporting: Draft the financial statements and disclosures. Execute: Discuss results with the audited firm; present to the firm's Board. There is of course an audit team that is involved, but for purposes of this question let's assume that the roles are assigned to individual resource groups within the team. In other words there are "Planners" and "Fieldworkers" and "Reporters" and "Executers" with per-person capacities given below. By how much does the system capacity increase if another "Fieldworker" is hired? 2 Planners (capacity of 12/yr); 3 Fieldworkers (capacity of 6/yr); 2 Reporters (capacity of 11/yr); and 3 Executers (capacity of 8/yr)