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D Question 1 0.4 pts If r(t) is the position vector for a smooth curve C, and T(t), N(t), and B(t) are unit tangent vector, principal unit normal vector, and binormal unit vector, respectively, then 1. N(t) . T(t) = 2. N ( t) . N (t ) = 3. B(t) . (3B (t ) + T(t) ) 4. B(t) x N(t) = (enter an upper case T for T(t), N for N(t), and B for B(t)) D Question 2 0.6 pts A particle moves with position function r(t) = (Int, tint, 2 ) At the point (0, 0, 1/2), find the following. 1. speed = [ Select ] 2. tangential component of the acceleration ay = [ Select ] 3. normal component of the acceleration ay = [ Select ]