13 4 i Let f x sin x 3 3x with xe 1 1 Given 0 1 find a 8 0 such that for all x y 1 1 if x y d then f x f y 0 1 E ii Consider x dx where f is as in part i The partition Pn cuts 1 1 into n equal pieces For what n we have U f P L f Pn 0 01 lot t