Question: Labeling the axes and intercepts, etc. make a neat sketch and name each of the following surfaces.

(a) \({{x}^{2}}+2{{y}^{2}}=4\)

(b) \({{x}^{2}}+2{{y}^{2}}=z\)

(c) \({{x}^{2}}+{{y}^{2}}-4{{z}^{2}}=4\)