POW-1: Sune Kristian Jakobsen, Philipp Lampe (Univ of Bonn), and Paul Shearer (Univ of Michigan).

POW-2: Sune Kristian Jakobsen, Philipp Lampe (Univ of Bonn), and Paul Shearer (Univ of Michigan). Solutions to part 1 given by Jimbo Doe, Jason Dyer, and Marni Sheppeard.

POW-3: Rod Carvalho, Jöel Duet, Philipp Lampe (Univ of Bonn), Gantumur Tsogtgerel (UC San Diego), and Nilay Vaish.

POW-4: David Eppstein, Sune Kristian Jakobsen, and Philipp Lampe (Univ of Bonn).

POW-5: Balkrishna Patankar, Akhil Ravidas, Animesh Datta (Univ of New Mexico), Philipp Lampe (Univ of Bonn), Kenneth Chan, and Nilay Vaish.

POW-6: No entries.