Please help me for solving the MATHEMATICAL PROGRAMMING QUESTION

 3. I will give you a copy of a mathematical programming problem already written in GAMS. You will be asked to:
a) Describe the problem in plain language from the given GAMS language and express the problem in compact equation form. 

b)  Run the GAMS program and:
(i) Report the optimum levels of the decision variables and the objective function.
(ii) Indicate which of the constraints are binding.
(iii) Interpret the marginal (dual) values of the constraints
(iv) Use the marginal values as a guide to a managerial decision.