The answer would be y axis, x axis, another y axis and x axis. One then can reflect y axis (5,1) and would reflect to x axis (5,-1) And then across y axis (-5,1) and would back to (-5,1). Hope this is the answer and would help.
Scientists believe convection currents are the force behind the plate tectonics theory.
B the north European plain provides navigable rivers
The gravity model was created by Newton.
