Solve all of the following problems, then choose 5 of them to
write up to perfection.
4.1.7, 4.1.9, 4.1.15, 4.1.16, 4.1.17, 4.2.8, 4.3.2, 4.3.5, 4.3.10,
4.3.13, 4.3.14, 4.4.2, 4.4.7, 26.2.7, 19.2.7, 19.2.8 (for the last
two problems you may assume that R is commutative if desired).
Homework 3: Due Friday October 6.
Solve all of the following problems, then choose 5 of them to
write up to perfection.