Students of a school are standing in rows and columns in their playground for a drill practice. A, B, C and D are the positions of four students as shown in the figure.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1533482/original_15-07.png)
(i) What are the coordinates of A and B respectively?
(ii) What is the distance between B and D?