Question: Sketch the unit sphere S| C R3 for (a) The L1 norm. (b) The norm, (c) The weighted norm ||v||2 = 2v21 + v22 +

Sketch the unit sphere S| C R3 for
(a) The L1 norm.
(b) The norm,
(c) The weighted norm ||v||2 = 2v21 + v22 + 3v23,
(d) The norm
||v|| = max{ |v1 + v2, |v1 + v3|. |v2 + v3| ).

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