The following equations describe the economy of a country

Y = C + I + G

C = 50 + 0.75 (Y - T) > Please Becareful its 0.75 not 0.7 :"], thank u

I = 150 - 10 r

(M / P) d = Y - 50r

G = 250

T = 200

M = 3000

P = 4

From these equations: (a) find the function of the goods market equilibrium (IS) and graph it, (b) find the money market equilibrium function (LM) and graph its function, and (c) find the income ( Y) and the interest rate (r) equilibrium.