A $3\mathrm{.}0-kg$ object moves to the right at $4\mathrm{.}0\frac{m}{s}.$ It collides head$-$on with a $6\mathrm{.}0-kg$ object moving to the left at $2\mathrm{.}0\frac{m}{s}.$ Which statement is correct?

The total momentum both before and after the collision is zero.

None of the others are true.

The total momentum before the collision is $24kg*\frac{m}{s},$ and after the collision is $0kg*\frac{m}{s}.$

The total momentum before the collision is $0kg*\frac{m}{s},$ and after the collision is $24kg*\frac{m}{s}.$

The total momentum both before and after the collision is $24kg*\frac{m}{s}.$