A $77\mathrm{.}0-$kg fullback running east with a speed of $4\mathrm{.}20$ m$/$s is tackled by a $91\mathrm{.}0-$kg opponent running north with a speed of $3\mathrm{.}00$ m$/$s$.($a$)$ Explain why the successful tackle constitutes a perfectly inelastic collision.This answer has not been graded yet.$($b$)$ Calculate the velocity of the players immediately after the tackle.magnitude m$/$sdirection $\backslash$deg north of east$($c$)$ Determine the mechanical energy that disappears as a result of the collision. JAccount for the missing energy.