Recall that average velocity is equal to change in position over a given time interval,
so that the x-component of
is
and its y-component is
Solve for
and
, which are the x- and y-components of the copter's position vector after t = 1.60 s.
Note that I'm reading the given details as
so if any of these are incorrect, you should make the appropriate adjustments to the work above.