<image>As shown in the figure:

(1) The number corresponding to point A on the number line is -2. Point B is 4 units to the right of point A. Find the number corresponding to point B.
(2) Starting from the positions of points A and B in part (1), point A moves to the left along the number line at a speed of 2 units per second, and point B moves to the right along the number line at a speed of 2 units per second. When point A reaches -6, find the distance between points A and B.
(3) From the positions at the end of part (2), if point A remains stationary and point B moves to the left along the number line at a speed of 2 units per second, how long will it take for points A and B to be 4 units apart?