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A skydiver with a weight of $-750\text{ N}$ is falling with a velocity of $-50\text{ m/s}$ when he opens his parachute. Here the negative signs indicate the negative $y$-direction (downward). After opening the parachute, an upwards air resistance of $800\text{ N}$ acts on the skydiver.

If the skydiver reaches the ground $72\text{ seconds}$ after opening his parachute, how fast is he going when he lands?

A

$0\text{ m/s}$

B

$0.65\text{ m/s}$

C

$1.3\text{ m/s}$

D

$3.0\text{ m/s}$

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