Don't understand this problem

The city of Santa Cruz has 100 residents who each have the identical demand function for a park area: P = 10 Q. The marginal cost of providing parks is MC(Q) = 10 + 10Q. If the city of Santa Cruz provides a park area, all of the residents can enjoy the area. If the city of Santa Cruz does not offer public park area, how much area of parks will each individual resident maintain on their own? What is the optimal level of public parks in Santa Cruz? How much would each resident need to contribute to provide the optimal park area