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I was wondering if anyone could offer some advice on this one. I have a multi-part problem, in which I can't get the second part. It starts like this:

(a)

Find the equation of the sphere passes through the point (6,-2,3) and has a center of (-1,2,1).

So I did this find and came up with:

*(x+1)²+(y-2)²+(z-1)² = 69*

(b)

Find the curve in which this sphere intersects the

*yz*-plane.

So this is where I am stuck...