Questions 5 through 7 are based on the diagram below. 750 Aggregale consumphan 310 150 100 200 350 gregate inrome 5. In this economy, aggregate saving (S) will be zero if aggregate income (Y) is: a. $150 b. $750 C. $500 P $550 6. For this economy, aggregate saving (S) is positive if aggregate income (Y) is: a. between $200 and $550 b. between $0 and $750 C . above $750 d. equal to $750 7. For this economy, the equilibrium level of aggregate income (Ye) is: a. $750 b. $150 C. $100 d. none of the above