$7)$ Oh no$!$ Splash Works is not working at Paramount Canada$$s Wonderland. $$Never fear$,$ such a little thing will not scare Mohamad and Hailey from the wave pool! While standing $466\mathrm{.}0$ cm apart they both perform an amazing back$-$flip cannon ball and land perfectly in phase with each other. For whatever reason, Liliana wants to calculate the speed of the waves generated and collects the following data from the $2$ nd nodal line. X$2=98\mathrm{.}0$ cm$,$ L $=277$ cm$,$ $2=21$o $,$ and $5$ crests pass by in $4\mathrm{.}00$ min and cover a distance of $440\mathrm{.}0$ cm$.$ Calculate: $$ the wavelength using three different methods $(8$ marks$)$ the speed of the waves. $(3$ marks$)$