1. [Parse Tree and Derivation] Problem set 6c, page 163.
2. [Language Recognizing] Problem set 11, page 164.
3. [Attribute Grammars] Problem set 20, page 165.
4. [Referencing Environment] Problem set 10, page 238.
5. [Types] Problem set 14, page 314. 

Each 10 points.