What is the effect on real GDP of a ​$150 billion change in planned investment if the MPC is ​0.65? ​$ nothing billion. ​(Enter your response rounded to the nearest whole​ number.)Consumption $1,200 2,100 3,000 Disposable Income $3,000 4,000 5,000 Given the consumption schedule in the table above, the marginal propensity to consume is:______a. 0.1b. 0.3c. 0.9d. 0.6