2. Consider the export/import model X = 1000 - 20E + 0.2YF M = 450 + 10E + 0.15Y, X = M, where X represents exports, M represents imports, E represents the exchange rate, YF represents foreign income, and Y, represents domestic income. The exogenous variables include Y, andY, 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.