Answer
(a) the man will reach the ground first
Work Step by Step
The equation for moving down through the air is:
Force of wieght- air resistance= net force
$mg-f=ma$
Rearranging the equation for $a$ and $m$:
$ma=mg-f$
$a=g-\frac{f}{m}$
We thus see that the man will reach the ground first.
