10.3 if the value of the marginal propensity to consumer is 0.6 and real GDP falls by $25, this was caused by a decrease in the aggregate expenditures schedule of $.....?

10.4. If the MPC is 0.67 and if both planned gross investment and the saving schedule increase by $25, real GDP will: a) increase by $75 b) not change c) decrease by $75 d) increase by $25

10.5. If in an economy a $150 bln increase in investment spending creates $150 bln of new income in the first round of the multipler process and $105 bln in the second round the multipler -? the MPC -?