4. Company A need to decide the optimal inventory level of product I in the next six months, with the objective to minimize the overall cost. Table below gives the product demand, unit ordering cost, and unit storage cost. Use dynamic programming to solve this problem. Month k 1 2 3 4 5 6 Product 50 55 50 45 40 30 Demand dk Unit ordering 825 775 850 850 775 825 cost ck Unit storage 40 30 35 20 40 ! cost Pk 4. Company A need to decide the optimal inventory level of product I in the next six months, with the objective to minimize the overall cost. Table below gives the product demand, unit ordering cost, and unit storage cost. Use dynamic programming to solve this problem. Month k 1 2 3 4 5 6 Product 50 55 50 45 40 30 Demand dk Unit ordering 825 775 850 850 775 825 cost ck Unit storage 40 30 35 20 40 ! cost Pk