In this challenge, you'll attempt to build this bowling ball using only 2 surface equations with domain restrictions. Watch this screencast carefully. The radius of this ball is made evident here.

**With respect to the holes:**1) The projection of the largest hole onto the plane z = 0 is a circle with center (2.5, 0,0) and radius = 0.6. 2) The projections of the centers of the smaller two holes onto the plane z = 0 are points that are 1 unit away from the origin. These two points and the point (1,0,0) serve as vertices of an equilateral triangle. 3) The projections of the two smaller holes onto the plane z = 0 are circles with radius = 0.5.