A $49\mathrm{.}0$ g marble moving at $2\mathrm{.}10$ m$/$s strikes a $24\mathrm{.}0$ g marble at rest. Note that the collision is elastic and that it is a "head$-$on$"$ collision so all motion is along a line. What is the speed of $49\mathrm{.}0$ g marble immediately after the collision? What is the speed of $24\mathrm{.}0$ g marble immediately after the collision?