I'm not sure how to solve for Y in the first part of question and i'm stuck.

A simplified economy is specified as follows: A. Goods market, all values C, I, G and NX values are in billions of CS: Consumption Expenditure: C = 140 + 0.6(Y-T) Investment Expenditure: 1 = 1,400 - 520/ Government Expenditure: G = 250 Lump-sum Constant Taxes: T = 250 Exports: 70 Imports: 10 B. Money market, all Mo values are in billions of C$: Interest Rate: i = 0.12 or 12% Money Demand: Md = 890 - 1,800/ Note: Please keep your answers accurate to two decimal places. a) Given the above information, solve for the following: the equilibrium Y, the money supply M, the consumption expenditure C, and the investment expenditure I. Y = 0 M = 0 C = 0 = 0 Now suppose there is an impending federal election, and the government promises to use fiscal policies to stimulate the economy