Find equilibrium gdp using the following macroeconomic model (the numbers, with the exception of the mpc, represent billions of dollars): c = 1 comma 250 + 0.90y - consumption function i = 2 comma 000 - planned investment function g = 1 comma 500 - government spending function nx = 200 - net export function y = c + i + g + nx equilibrium condition the equilibrium level of gdp is $ billion. (round your answer to the nearest billion dollars.)