pls explain like its a written exam

Question 6.6 (10pts) You are considering a luxury apartment building project that requires an investment of $15,000,000. The building has 50 units. You expect the maintenance cost for the apartment building to be $300,000 the first year and $320,000 the second year. The maintenance cost will continue to increase by $20,000 in subsequent years. The cost to hire a manager for the building is estimated to be $70,000 per year. After five years of operation, the apartment building can be sold for $20,000,000. What is the annual rent per apartment unit that will provide a return on investment of 15%? Assume that the building will remain fully occupied during its five years of operation and rent remains constant each year. (If you use a computational tool such as Excel please make sure that your reasoning is clearly stated on your solution file) A) $38,257.57 B) $35,628.51 $32,712.74 D) Answers A. B and C are not correct