The process below is for the production of lactic acid and the compositions of the streams are given in the table below The following composition (wt.\%) of the four components are given per stream. To make the lactic acid in stream 8, water (W), glucose (G), vitamins (V) and Lactobacillus (L) are added and a fermentation processes yields the final lactic acid. a. Estimate the degree of freedom for each of the subsystems (each process unit) b. Write the independent equation for each subsystem