maximum value = 11143 at 2 
maximum value = 11153.5 at 2 
maximum value = 11155.3 at 2 
maximum value = 11134.3 at 2 
maximum value = 11220 at 2 
maximum value = 11053.9 at 2 
maximum value = 11233.9 at 2 
maximum value = 11162.8 at 2 

(11143+11153.5+11155.3+11134.3+11220+11053.9+11233.9+11162.8)/8.
11157.08750

16055.6-11157.0875
4898.51250