Sketch the trace and compute the arc length of each of the following. a) (0 = (et
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a) ɸ(0 = (et sin/, et cost, et), t ∈ [0, 2π]
b) y3 = x2from(-l, 1) to (1,1)
c) ɸ(t) = (t2, t2, t2), t ∈ [0, 2]
d) The astroid of Example 13.5
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