Consider the following mathematical model. Prepare a spreadsheet model for this model, and solve it using Excel solver to get an optimal solution. Max Z = 2x + xy + 4x2 + 3x, subject to x + xy +3x3 + 2x, 54 x -x+x, 21 x + 2x + xy + 2xy = 6 x 20,X, 20,X, 20,x, 20 a. Use meaningful labels in your spreadsheet model. Labels include x1, x2, x3, and x4 for the name of the variables, constraint 1, 2, and 3 for the name of the functional constraints, right-hand side values, objective function coefficients, and objective function value. (5 marks) b. Copy each formula you have used in a cell of your spreadsheet model and paste it and its address here. For example, G8=SUMPRODUCT(C8:58,011:F11). (5 marks) C. Report a screenshot of your spreadsheet model that has been solved and the optimal solution can be seen in it. (15 marks)