You are given the following data; Group 1 1,1+,2,2+,2+,3 Group 2 1,2+.24,2,3+,4 Group 3 1+,2,2,2+,3,3+,4+ +: right censored A cox regression model is used for modeling the data. The investigator hypothesized that the hazard ratios from Groups 2 and 3 compared with Group I are both one half. Give the score test to test this hypothesis. Refer to last question, construct a 95% confidence interval for the hazard ratio from Group 2 compared with Group 1 if the estimated hazard ratios of Group 2 and Group 3 compared with Group 1 are 0.625 and 0.511, respectively