In the following diagram, How can the point Y1 be interpreted? Select more than one answer (eg, individual investment level) Privately rational decrope a. Some agents invest even if others in the economy don't. b. The S-shaped curve is increasing because of large Expected decision by other agents (on. average investment level) spillover effects. c. With zero expected investment by others, everyone in the economy will decide not to invest. d. By complementarity, agents who invest will not affect other agents' investment decisions. e. Agents who invest expect to export their products to other countries