The marketing manager of a large supermarket chain would like to use shelf space to predict the sales of pet food. For a random sample of 15 similar stores, she gathered the following information regarding the shelf space, in feet, devoted to pet food and the weekly sales in hundreds of dollars. .

Store	Shelf Space	Weekly Sales
1	5	1.3
2	5	1.6
3	5	1.4
4	10	1.7
5	10	1.9
6	10	2.3
7	15	2.2
8	15	2
9	15	1.8
10	20	2.2
11	20	2.4
12	20	2.9
13	25	2.9
14	25	2.7
15	25	2.5

Find the 99% prediction interval for the Weekly Sales when the shelf space is 30. (round to 3 decimal places)