Dont really know where to start with this question any help would be much appreciated.

PART II (4 points) Setting up the economy for the short-run model Yo= Cath+ Got X-IM where by - Q=och +Y-bo(R-)Y - X = XX Y. - IM = DIM Y a. Derive the new IS curve. (3 points) b. How does your new IS curve differ from the IS curve we discussed in class? (1 point)