a) A chemical agent (A) can be added to blood vessels to dissolve unhealthy fat deposits. These chemical agents are added via a uniform coating on the inside of the tube as shown below. Use the general steady-state shell mass balance on an increment (AZ) of the coated tube to prove that the concentration leaving the tube (CAI) is given by the following equation: Cap = Cas(1 - eKu - Where: Car is the final concentration leaving the tube. Cas is the concentration at the inside surface of the tube. (L) and (D) are the length and the diameter of the tube. (V) is the flow velocity of the chemical agent inside the tube. tube length L, diameter D CA CAF CAO, V Z Z+AZ in uniform thin 0.01 cm