Two non-interacting tanks are connected to each other in series. Valve resistance in both tanks is 1 min / m2, Area = 2 m 2. The inlet flow rate to the first tank suddenly changes from 10 m 3 / min to 20 m 3 / min at t = 0. a) Write the transfer function for the process. b) Find the height of the liquid level in the 3rd minute.