For problems 1 6 find the domain of the given function.
1.
2.
3.
4.
5.
6.
For problems 7 11 identify and sketch the level curves (or
contours) for the given function.
7.
8.
9.
10.
11.
For problems 12 14 identify and sketch the traces for the
given curves.
12.
13.
14.