2. Consider the export/import model (10 Points) X =1000-20E+0.2YF M =450+10E+0.15 Y X =M where X represents exports, M represents imports, E represents the exchange rate, represents foreign income, and . represents domestic income. The exogenous variables include 's and D , and the endogenous variables are X, M, and E. a) Set this up as a system of equations, and solve this system by finding the inverse of the matrix of parameters. b) Determine the impact on exports of a $100 increase in foreign income, ceteris paribus