A $49\mathrm{.}0$ gg marble moving at $2\mathrm{.}10$ m$/$sm$/$s strikes a $30\mathrm{.}0$ gg 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 $49\mathrm{.}0$ gg marble immediately after the collision?

Express your answer with the appropriate units.

What is the speed of $30\mathrm{.}0$ gg marble immediately after the collision?

Express your answer with the appropriate units.