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