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. [br][br][b]With respect to the holes: [/b][br][br]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. [br][br]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. [br][br]3) The projections of the two smaller holes onto the plane z = 0 are circles with radius = 0.5.