A $2\mathrm{.}28-$kg power line running between two towers has a length of $38\mathrm{.}2$ m and is under a tension of $11\mathrm{.}1$ N$.($a$)$ What is the speed of a transverse pulse set up on the line? m$/$s$($b$)$ If the tension in the line was unknown, describe a procedure a worker on the ground might use to estimate the tension.