Find the center of mass for each of the following regions.
1. The region bounded by , and the x-axis.
2. The triangle with vertices (-2, -2), (4, -2) and (4,4).
3. The region bounded by and .
4. The region bounded by and the x-axis between .
5. The region bounded by and .
6. The region bounded by and the x-axis between .
7. The region bounded by and between .