Answer the following questions about the sphere whose equation is given by $$x^{2}+y^{2}+z^{2}-4x+6y = 12.$$

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1. Find the radius of the sphere.
Radius: $r =$

2. Find the center of the sphere. Write the center as a point $(a,b,c)$ where $a$, $b$, and $c$ are numbers.
Center:

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