I have a serie of problems due next week but I dont think I can finnish all in time, so i need help with at least two of these problems. They are process problems, some of them already have solution but the task is about making a complete understanding of the problem and the solutions. The main task of each problem are: 1. A quick statment about the problem 2. A quick graphic representation 3. List of the simplification in the problem 4. Math model that represent the problem 5. Solution method 6.Simulation that show the influence of the main variables Some of these are already in the paper but without all the steps. This is not my main language so if I write something wrong or dont explain it correctly let me know.