Consider the following equation of a quadric surface 9x^2 - 81y^2 - (z^2/4)=0 (a) Find the intercepts with the three coordinate axes, when they exist. (b) Find the equations (and describe them in words) of the xy−, xz−, and yz− traces, when they exist. (c) Identify (by name) and sketch a graph of the surface.

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