Two groups of people with coronary heart disease receive two different drugs. The patients are followed over time. Among the patients in the first group, 1.7% eventually suffered a heart attack. 0.9% of the patients in the second group eventually suffered a heart attack. (a) Does this imply that the second drug works significantly better? Explain.(b) If I provide you the additional information that both groups had 500 patients, how will your answer change?