N= 5 divides the interval from 0 to 10 into 5 sub-intervals each of length 2: 0- 2, 2- 4, 4- 6, 6- 8, 8- 10. The midpoints of those intervals are 1, 3, 5, 7, and 9. The integral should be just .

Is that what you did? In any case, show how you did that and what you got.