My mother has Andersen casement windows on the first floor
of her house, and three of them have small problems.

(A) Two of them will not close all the way. When you turn
the handle the windows begin to close, then stop just
short of closing enough so that you can lock them.

(B) One window closes, but the handle can be quite tough
to turn, especially when the window starts from the
open-all-the-way position.

Are there adjustments I can make to fix these problems?
Thanks in advance.