(Solved): Determine the location of the center and the length of the radius of the cirle given by the equatio ...

Determine the location of the center and the length of the radius of the cirle given by the equation \( x^{2}+y^{2}-6 x+8 y+21=0 \) by following the steps given below. a. Fill in the values required to complete the square for the variables \( x \) and \( y \). \[ \left(x^{2}-6 x+\quad\right)+\left(y^{2}+8 y+\quad\right)=-21+ \] b. Write the equation in standard form: c. Where is the center of the circle located? Express your answer as a coordinate pair: d. What is the radius of the circle/