Problem 4 A diagram of a non-reactive process with multiple unit operations involving Species A, B and C is shown in Figure 2. You are beginning a material balance on the process and are considering where to start. (a) Outline a control volume (i.e. "draw a box") which would result in a balance with 0 degrees of freedom - this represents the first material balance you would perform. (b) Verify that there are 0 degrees of freedom for this balance. Specifically list all unknowns and equations for your degree of freedom analysis to receive full credit. You do not necessarily need to calculate the values of unknowns