7. Market failure associated with public goods A group of university students buys coconuts from a farmers' market. The students consume the meat of the coconuts for food and use the shells to make sculptures. These sculptures are placed in a public park that any student can visit. The park sustains itself through students' donations. Some individuals have no incentive to donate to the park and will, instead, depend on those who do donate. This is an example of which of the following? 0 The free-rider problem 0 A negative externality O Socially efcient allocation of coconuts O Overuse 0f coconuts