Which describes the free rider problem? Question 26Answer a. Four roommates want to buy a couch, but each figure that if he or she just lets the other three pay for it, he or she will still be able to use it once it is bought. They do not buy the couch. b. Four roommates want to buy a new couch. They need all four to afford it but if all four split the use of it, none of them will get enough value from the couch to be worth their share of the cost. c. Four roommates want to buy a new couch but cannot afford it. If there were a fifth roommate, they could afford it, but there is not. d. Four roommates want to buy a couch but are not sure who will get to keep it once they go their separate ways. The cost of having to figure that out ahead of time disincentivizes them from buying the couch