Study the scenario and complete the questions that follow: Staffing Agency Professional Staff Management (PSM) is a unique type of temporary staffing agency. Many organizations today hire highly skilled technical employees on a short-term, temporary basis to assist with special projects or to provide a needed technical skill. PSM negotiates contracts with its client companies in which it agrees to provide temporary staff in specific job categories for a specified cost. For example, PSM has a contract with an oil and gas exploration company in which it agrees to supply geologists with at least a master’s degree for R25,000 per week. PSM has contracts with a wide range of companies and can place almost any type of professional or scientific staff members, from computer programmers to geologists to astrophysicists. Source: Dennis, A., Tegarden, D. and Wixom, B. 2021. Systems Analysis and Design: An Object-Oriented Approach with UML. 6th edition. USA: Wiley. a. Create a use-case diagram for the PSM system. (10 Marks) b. Create an activity diagram for the PSM system.