Another way to parametrize the tractrix path given in Exercise 13 is (a) Show t...

Another way to parametrize the tractrix path given in Exercise 13 is

(a) Show that y satisfies the property described in part (b) of Exercise 13.

(b) In fact, y is actually a reparametrization of part of the path x of Exercise 13.Without proving this fact in detail, indicate what portion of the image of x the image of y covers.