2nd pass
   Example 2.36
   Example 2.37
   Example 2.38

Try some on your own...

1.19b --
   (((00)*(11))U01)* to NDFA
1.21b --
   convert FA to regular expression

1.46a
2.1b
2.4c
2.4d (in book)
2.5d (a tad hard)  -- PDA for 2.4d
2.30a
2.30c (in book)