An eight$-$person shell $($or "eight"$)$ is a light rowing craft approximately $17\mathrm{.}6-$m long with eight rowers and a coxswain who steers and calls the stroke. Assume that the speed of the shell is limited according to the rule given in the introduction. Estimate the time T$8$T$8$ it takes an "eight" to travel $2000$ m$.$ Estimate the time T$100$T$100$ it takes a good human swimmer, $1\mathrm{.}80-$m tall, to swim $100$ m$.$ Assume that the speed of the swimmer is limited by his or her height.