I cant paste graphs and things like that so had to do a screen shot
Image: http://i.imgur.com/9tbuw.jpg
Image: http://i.imgur.com/9tbuw.jpg
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9 ---> first
10---> last (not sure...)
11----> x = 28
13----> x = 18
15----> x =41
10---> last (not sure...)
11----> x = 28
13----> x = 18
15----> x =41