Complete the following textbook problems:
o Ch. 17, p.24, # 1
o Ch. 17, p.24, # 7
o Ch. 17, p.24, # 11
o Ch. 19, p.32, # 1
o Ch. 19, p.32, # 7
o Ch. 19, p.32, # 15
o Ch. 19, p.32, # 19
o Ch. 20, p.16, # 1
o Ch. 20, p.17, # 2
o Ch. 20, p.17, # 3