(7) Find the curvature of r(t) = (t, 1ft} at t = 1. (8) Consider curve given by the equation y = In at. (a) Find the point on the curve at. which the curvature If is at maximum. (h) Find lini K(:r). JET3'00 (9) Consider helix r{t) : ocos ti I asin tj + btk. (a) Find the arc length parametrization for the curve. (h) Find the length of the curve over the interval [Um/2]. (c) Find the curvature of the curve