How would you solve for a) & b) with a calculator? I have a TI-89 Titanium. At time t=0, a tank contains 38 gallons of water. Beginning at t=0, water flows into the tank at a rate of E(t) = 12tsin(π/4t) gallons per minute, and water leaks out of the tank at a rate of L(t) = 6t2/ (t+2) gallons per minute. a) How many gallons of water are in the tank at time t = 2 minutes? b) What is the rate of change in the volume of water in the tank at t = 2 minutes? (Include appropriate units)