Using only 2 surface equations, how can we reconstruct the arches of this bike rack? [br][br][b]Modeling Clues: [/b] [br][br]1) The radius of the small circle formed by the cross section of the plane [i]x[/i] = 0 and this entire surface is 1. [br][br]2) The shortest distance from the origin (0,0,0) to the [b][color=#ff00ff]pink surface[/color][/b] = 3 units. [br][br]3) The greatest distance from the origin (0,0,0) to the [b][color=#1e84cc]blue surface[/color][/b] = 5 units. [br][br][b]Additional Challenge: [/b][br][br]View 0:25 - 0:40 in the silent screencast below. How can we "flip" this surface upside down to model the bottom arch of this bike rack?