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Problem 17. (1 point) The function r (f) traces a circle. Determine the radius, center, and (incorrect) plane containing the circle r (1) = -7i+ (12cos())j+ (12 sin(t)) k Problem 14. (1 point) Plane : X = Find a vector parametrization of the curve x = -2z in the xz- Circle's Center : (- plane. Use f as the parameter in your answer. Radius : Answer(s) submitted: Answer(s) submitted: (incorrect) Problem 15. (1 point) (incorrect) Are the following statements true or false? 2 1. The line parametrization is parallel Problem 18. (1 point) to the x-axis. 2 2. A parametrization of the graph of y = In(x) for x > 0 is Use cos() and sin(f), with positive coefficients, to parametriza given by x = e' , y =t for -so