There is a tank of 5000 L total volume. The tank initially contains 1000 L of a liquid at 40C. 200 L/min of a liquid at 90C is feeding the tank, while 100 L/min of liquid is discharging from the tank at a temperature (T) "C. When the inlet and outlet valves are opened, an exothermic reaction takes place within the fluid in the tank, and 400 kj/min of energy is thus generated. At the same time, heat is lost to the ambient air 30C with A-2 m and h=20 W/mK. Assuming constant density (1kg/L) and constant cp (4 kj/kgC) and perfect mixing. Which equation shows the volume of the liquid in the tank as a function of time?