Point A is 40 m to the North of point B. Point C is 20 m to the West of point A. Poind D is 30 m to the South of point C. Poine E is exactly midway between points D adn F in such a maner that point D, E and F form a horizontal straight line of 40 m. Point F is to the East of point D. Point G is 30 m to the North of point F. How far and in which direction is point G from point A?