Consider the experimental design in the table that follows. This experiment was run in a chemical process.
(a) The response y1 is the viscosity of the product. Fit an appropriate response surface model.
(b) The response y2 is the conversion, in grams. Fit an appropriate response surface model.
(c) Where would you recommend that we set x1, x2, and x3 if the objective is to maximize conversion while keeping viscosity in the range 450 1