4. A study was conducted by Msuya et al. in 2018 on the production of lactic acid from the stem juice of the sisal plant. In the study, fermentation experiments were carried out to analyze the effect of initial sugar concentration and process temperature on production efficiency and the results are given in the table. a) Find and discuss all effects (double and single). b) Extract the experimental model equivalence, taking into account all effects. c) With the help of the model equation you found; 1. Find the yield (g/g) at 40C and 120g/L initial sugar concentration. ii. Find the yield (g/g) in case of 38C and 150g/L initial sugar concentration