Do all the exercises in Sections 2.6, 3.11, and 4.8 (i.e. the exercises for Chapters 2, 3, and 4). You don't need to turn anything in for exercise 2 of Section 2.6. And you can use either gch(i) or hugs for the exercises.
Solutions can be submitted by email to dbm@cs.uchicago.edu or as hard copy in class.