C. Determine the center and the radius of the circle using the following equation.

1. x^2 + y^2 - 6x + 4y - 3 = 0
2. x^2 + y^2 - 8y + 7 = 0
3. (x - 3)^2 + (y + 5)^2 = 144
4. x^2 + (y + 1)^2 = 64
5. (x - 4)^2 + y^2 = 196

SHOW YOUR SOLUTIONS COMPLETELY.​