Solve these problems. 
Find the coordinates of the point for each reflection.
(-5, 7) across the x-axis?
(2, 5.5) across the y-axis?
Find the distance between each pair of points.
(1, 1) and (1, -2) _________ units. 
(-2, 3) and (-4, 3) _________ units. 
Thank you.