The center of a circle is at (−2, −7) and its radius is 6.What is the equation of the circle?(x−2)2+(y−7)2=36(x−2)2+(y−7)2=3(x+2)2+(y+7)2=3(x+2)2+(y+7)2=36The equation of a circle is (x+4)2+(y−5)2=121.What is the center and radius of the circle?center: (4, −5); radius: 11center: (−4, 5); radius: 121center: (−4, 5); radius: 11center: (−4, −5); radius: 121