Task: Describe the policy mix that would result in each of the following situations:
a. The interest rate decreases, investment increases, and the change in aggregate output is indeterminate.
b. Aggregate out increases, and the interest rate change is indeterminate.
c. The interest rate increases, investment decreases, and the change aggregate output is indeterminate.
d. Aggregate output decreases, and the interest rate change is indeterminate.