Find the Center-Radius Form of the Circle Described or Graphed $( - 6 , - 7 )$

Find the center-radius form of the circle described or graphed.
-a circle having a diameter with endpoints $( - 6 , - 7 )$ and $( - 1,2 )$

A) $\left( x - \frac { 7 } { 2 } \right) ^ { 2 } + \left( y - \frac { 5 } { 2 } \right) ^ { 2 } = 74$
B) $\left( x - \frac { 7 } { 2 } \right) ^ { 2 } + \left( y + \frac { 5 } { 2 } \right) ^ { 2 } = 130$
C) $\left( x + \frac { 5 } { 2 } \right) ^ { 2 } + \left( y + \frac { 9 } { 2 } \right) ^ { 2 } = 106$
D) $\left( x + \frac { 7 } { 2 } \right) ^ { 2 } + \left( y + \frac { 5 } { 2 } \right) ^ { 2 } = \frac { 53 } { 2 }$