1. problem 2-2 see attach file img 2643 2. problem 2-8 see attach file img 2644 3. problem 2-40 see attach file img 2645 4. problem 2-44 see attach
1. problem 2-2 see attach file img 26432. problem 2-8 see attach file img 26443. problem 2-40 see attach file img 26454. problem 2-44 see attach file img 2647 Attachment 4