Help in finding the constraints, objective, and decision variables

MS electronics supply highly complex components for military communications systems. Four products, named the MX range, share the labor hours available for each of the four production processes: wiring, drilling, assembly and finishing. For each product and each process, the hours of labor required for each unit of production and the total hours available per month are shown in the table below. The table also shows the profit earned per unit for each product and the minimum monthly demand for that product. Product Hours of labour per production unit Profit Minimum per unit (type of component) Wiring Drilling Assembly Finishing Demand Time (no. of units) MX1 15000 MX2 500 MX3 1800 MX4 900 Labor available 16000 18000 12000 10000 (hours per month) MS electronics need to know how many of each type of component they should produce each month to achieve their objective subject to unit profit figures and constraints mentioned above. This problem was formulated as a linear programming model and then solved using Microsoft's Excel Solver Add-in. The relevant Solver output is given in the Appendix. Using the Solver output and where necessary the information given above, answer the following questions