A tank contains 4000 L of pure water. Brine that contains 40 g of salt per liter of water is pumped into the tank at a rate of .3 Lfmin. The function below models the concentration of salt, C, [in grams per liter) after t minutes. so: C(t) : 800 t Determine the limit of C(t] as t. 4; co, Ifthe limit is infinite, enter innityr or -innit3r. If the limit is not innite and does not exist, enter DNE