Water is a ded at a flow ate of 150 kg /hour in roder to dilute the acetic acid solution that enters a well-mixed tank at a flow rate of 30kg/ hour. The resulting dilute solution leaves the tank at a flow rate of 120kg/hr. When the process starts, the tank contains 100kg of fresh water and the flow rates remain constant throughout the process. According to this a. Write the symbolic equations that describe the system dynamics. b. Derive the expression for the variation of the effluent concentration with time. c. How much time should pass for 10% acetic acid concentration at the tank outlet. d. What is the highest acid concentration that can be reached at the tank outlet