Find the length of the following two-dimensional curve. r(1) = (2117 - 9,7212 + 3), for Ost= 1 The arc length is L = (Type an exact answer, using radicals as needed.)laxvl Use the alternative curvature formula k = Iv/ to find the curvature of the following parameterized curve. r(1) = (3+217 ,t,0) K=