(a) (1 point) Let S1 and S2 be two data sets with n binary samples ({0, 1}-valued) each. Additionally, also assume that S1 and S2 differ at most by one item. More precisely, we can construct S2 by removing one element from S1 and adding another binary value (0 or 1). Show that the sample means for the two sets are close. Specifically, show: pn(S1) pn(S2) n1 . (2)