The following homework problems are from the textbook pages 111-113.

• P4.3 (10 points each) (a), (b), (c), (d),(e)
  
  
• P4.5 (10 points each) (a), (b), (e)
  
  
• P4.10 (20 points), (a)
  
  
• #4 (20points): Find the inverse z-transform of 1/(4+5z^{-1}+z^{-2}).