=== Hand in solutions to:

Section 4.1: 3, 4, 9, 13
Section 4.2: 2(bdf), 6, 18
Section 4.3: 6, 7, 12

=== Suggested problems: (Do not hand in)

Section 4.1: 6, 19
Section 4.2: 8, 10
Section 4.3: 21, 22, 26