Researchers are interested in the relationship between maternal hypertension and risk of eclampsia in expecting mothers. In order to investigate the relationship, the research team has decided to follow a group of expecting mothers and track their blood pressures up to delivery and analyze the difference in risk between the exposure groups. The following 2x2 table summarizes the preliminary results. Eclampsia No Eclampsia Total Hypertension 167 105 272 No Hypertension 26 189 215 Total 193 294 487 A) Calculate the risk difference between the exposure groups. B) Construct a 95% confidence interval about your estimate. C) Carry out a formal test for significance at the alpha level of 0.05. Write out your null and alternative hypotheses and interpret your results from your confidence interval as well as your significance test describing the difference in risk for eclampsia by hypertensive status