Beny-Trezel is a company that sells wind turbine generators for wind farms. Based on the sales department, the company must meet the following demands on time: Month Demand July 1 unit e T Based on past data, it costs $4 to place an order, and a $2 per-unit holding cost is assessed against each month's ending inventory. Suppose that at the beginning of July, 1 unit is available as inventory. Orders are delivered instantaneously. The company wants to generate an inventory management and order plan for these months to minimize their costs. a) Ifthis problem is to be solved via dynamic programming, what can be the appropriate stages? b) Define the function to be evaluated during the computations for the stages of dynamic programming (i.e. define the recursive formula to be evaluated) ) For the initial stage what is (are) the appropriate state(s)? Why? d) Show the corresponding mathematical calculations for the last two stages