Need help badly, calculating the rate of falling objects

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To determine the speed of the mailbag after 4 seconds, it is assumed that it has the same initial velocity as the helicopter, which is 2.68 m/s downward. After release, the mailbag accelerates towards the Earth at 9.81 m/s² due to gravity. The final speed can be calculated using the equation v = initial velocity + (acceleration × time). Thus, after 4 seconds, the speed of the mailbag will be 2.68 m/s + (9.81 m/s² × 4 s). The resulting speed is straightforward to compute.
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Homework Statement



A small mailbag is released from a helicopter that is descending steadily at 2.68 m/s.
(a) After 4.00 s, what is the speed of the mailbag?
v = ?


Homework Equations





The Attempt at a Solution

 
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i think you can assume that the mail bag has an initial velocity identical to that of the helicopter.

Once it has been released in midair, it will start accelerating at 9.81 m/s^2 to earth, the calculation becomes trivial
 

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