1-5. Find the coordinates of the center and the measure of the radius for a circle whose equation is, 1. (x-8)^2+(y+4)^2=12 2. (x+8)^2+(y-4)^2=81 3. X^2+(y-5)^2=9 4. (x+4)^2+(y+5)^2=64 5. (x-7)^2+(y-3)^2=144 6. Write the equation of a circle whose center is (0, -5) and radius is 7. 7. Write the equation of a circle whose center is (6, -1) and diameter is 12. 8. Write the equation of a circle whose center is (-2, 3) and radius is 4. 9. Find the radius of a circle whose center is (0,3) and a y-intercept of (0,7).