S1.5: 1(a-h), 4(f-j), 12, 18, 24, 30.

S2.1: 1bcdf, 2, 5, 11

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

S1.5: 14, 19, 25, 29, 31, 32.

S2.1: 1aeg, 3.