I really need help solving question #2 from the following webpage: http://www.math.psu.edu/anand/M141/applied2/ [Broken]. I've attempted to solve this, but looking at my answers, I'm not overly confident. In part a, I'm suppose to prove that tractrix somehow, and in part b, I believe I am to just integrate that given equation... But I'm not 100% sure (especially with part a)... I'd be eternally grateful to any help given.