16-19. Working with vector-valued functions For each vector-valued function r, carry out the following steps. a. Evaluate lim r(t) and lim r(t), if each exists. b. Find r'(t) and evaluate r'(0). c. Find r"(t). d. Evaluate fr(t) dt. r(1) = (sin 21, 3 cus 41, 1)

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