Do the problems enumerated below from hw4.pdf. (The first four problems are from the textbook, but the numbering in the two English editions and the Korean edition is not the same, so refer to the PDF file for the precise problem statement.)

- Problem 5.22.
- Problem 5.23.
- Problem 5.27.
- Problem 5.31.
- The minimum zap problem (from Jeff Erickson's lecture notes) (a) and (b).

As usual, you are allowed to work in groups of two students. Submit the homework on paper in our homework box (Box #7 next to our classroom).

The deadline is May 9, at 12:59 just before our class.