Question: please answer following questions, the first part is correct. Consider the helix r(t) = (cos(-2t), sin(-2t), 2t). Compute, at t = : A. The unit

please answer following questions, the first part is correct.

Consider the helix r(t) = (cos(-2t), sin(-2t), 2t). Compute, at t = : A. The unit tangent vector T = ( -sqrt(3)/sqrt(i -1/sqrt(8) 2/sqrt(8) B. The unit normal vector N = ( C. The unit binormal vector B = ( D. The curvature K =

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2. Provide new information and before 20 seconds have elapsed, add more infor-mation. The initial information will then be lost from memory for most people.

7. What is the extent (percentage) of errors detected in the information collected?

8. What are the costs of collecting the information?