Assume that the marginal propensity to consume is 0.75 and that taxes are exogenous. Imagine that government expenditure increases by $10m. Begin by assuming that the interest rate and prices stay...

Assume that the marginal propensity to consume is 0.75 and that taxes are exogenous. Imagine that government expenditure increases by $10m. Begin by assuming that the interest rate and prices stay fixed. 1. What is the value of the aggregate expenditure multiplier (k)? 2. How would the change be represented in an AD-AS diagram? 3. How would the change differ if the interest rate could change (assuming prices remain fixed)? 4. How would the change differ if the price level could also change?