A survey was conducted among 68 patients admitted to a hospital cardiac unit during a two-week period. The data of the survey are shown below. Let B = the set of patients with high blood n(B) = 28 n(B n S) =8 pressure. n(C) = 27 n(B n 0) =7 Let C = the set of patients with high n(S) = 24 n(B n 0 n S) =5 cholesterol levels. Let S = the set of patients who smoke [ (B n () V (B n S) U (C n S)] =12 cigarettes. Answer parts (a)-(d) below. (a) Find the number of these patients that had either high blood pressure or high cholesterol levels, but not both. The number of cities that had high blood pressure or high cholesterol levels, but not both, is (b) Find the number of these patients that had fewer than two of the indications listed. The number of patients that had fewer than two of the indications listed is (c) Find the number of these patients that were smokers but had neither high blood pressure nor high cholesterol levels. The number of patients that were smokers but had neither high blood pressure nor high cholesterol levels is (d) Find the number of these patients that did not have exactly two of the indications listed. The number of patients that did not have exactly two of the indications listed is