4. Arc Length and Unit Tangent Vectors: a. Calculate the length of the curve 7(t) = 4 sin(t) i + 3tj + 4cos (t)k from 0 sts 2n. b. Verify this calculation by using GeoGebra (hint there is a function in GeoGebra to calculate arc length). c. Calculate the unit tangent vector for part a. at the point when t = d. Graph the curve in part a. using GeoGebra, also eraph the unit tangent vector in part c.

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