0, y(1) = 1. 3. A tank whose volume is 40 L is initially half full of a solution that contains 10 g of a chemical. A solution containing 2 g/L of the same chemical flows into the tank at a rate of 4 L/min, and the well-stirred mixture flows out at a rate of 2 L/min. (a) (10 pts) Find the amount of the chemical in the tank at time t, or Q(t). (b) (5 pts) Find the time when the tank begins to overflow