Question 4 No cardiovascular Cardiovascular Total disease disease No hypertension 2754 188 2942 Hypertension 659 181 840 Total 3413 359 3782 This two-dimensional contingency table (2x2) contains data that show the relationship between prevalent hypertension and prevalent cardiovascular disease of a heart study of a province in South Africa. Using these data, calculate the 4.1 prevalence of persons with hypertension who have DVD. (4) 4.2 prevalence of persons free of hypertension but who have CVD. (4) 4.3 relative risk or risk ratio of CVD in hypertensive as compared to non- hypertensive. Please provide an explanation of your result. (10) 4.4 odds ratio of CVD in hypertensive as compared to nonhypertensive. [7)