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Could you help me with this question please? 1. (12 points) Let r(t) = (sin(2t), cos(2t), t). (a) (4 points) Find the unit tangent vector

Could you help me with this question please?

1. (12 points) Let r(t) = (sin(2t), cos(2t), t). (a) (4 points) Find the unit tangent vector at t = 1/2. (b) (4 points) Find the principal unit normal vector at t = 1 /2.

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