The following homework problems are from the textbook pages 113-115.

• P4.13 (20 points each) (a), (b), (c)
  
  
• P4.15 (10 points each) (a), (b), (c), (d)
  
  
• P4.17 (20 points)
  
  
• P4.19 (10 points each) (a), (b), (c), (d)