Use the information in the following table to do exercises $8-15$: Y $$100$ $$300$ $$500$ $$700$ $$120$ $$300$ $$480$ $$660$ $$20$ $$20$ $$20$ $$20$ G $$30$ $$30$ $$30$ $$30$ $$10$$$10$$$30-$$$50$

$3.$ What are the leakages from and injections into spending? $$ Leakages are saving, taxes, and imports; injections are investment, government spending, and exports. $$10-16$ Equilibrium real GDP occurs where leakages equal injections. $$10-1$b$.$

$8.$ What is the MPC$?$

$15.$ What are the equations for the consumption, net exports, and aggregate expenditures functions?