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(i)= L6 (sample points are left endpoints)

ii= r6 ('' '' '' '' right end point)

iii = m6 ('' '' '' '' are ,midpoints)

here is what i did, i sketched it already, y=f(x)

L6= 2 * 8.8 + 2 * 8 +.... 2 * 1 = 69.6

r6 = 2 * 9 + 2 * 8.8 +..... 2 * 4 = 85.6

m6= 1 (9) + 3(8.8) + 5 (8) .... 11 *4 = 222.4

is this right, i think i did it wrong because of it talks about sample points