Question: find the point of intersection between the surface y9 and...

Find the point of intersection between the surface y=9 and the tangent line to the curve of intersection at the point (-3,0,3) of the following two surfaces x^2 + y^2^ + z^2 = 18 and z^2 = x^2 + y^2 that resides in octets 1 through 4 ( z > 0)