1) What is survival analysis used for? Please provide an example. (1 point) 2) What is the difference between hazard ratio and odds ratios? (1 point) 3) Suppose we run a clinical trial to evaluate the survival of patients with mucosal melanoma of the head and neck. Eleven participants received a combination of surgery and chemotherapy. The primary outcome is death and participants are followed for up to 48 months (4 years) following enrollment into the trial. Based on the provided information, please complete the last three columns, reporting 4 decimal places for proportions. (2 points total; 1 point for 6'h column and lpoint for the 7th and 8'h column) Table 1. Life table for sample of 11 patient with mucosal melanoma of the head and neck receiving chemotherapy before surgery "1 W. at E'F'Wrt WM} PEI-q. Fanny-P. Interval Number Number of Number Number of Proportion Proportion Cum Start time Entering this withdrawn exposed Iu Terminal Terminating Surviving Proportion (Month) Interval During Risk Events Survival at End Interval (Death) 0 I l 0 l I 0 H I l I [0.5 l 16 9 0 9 1 2A 8 0 8 l 32 7 l 6.5 l 40 5 0 5 0 48 5 l 4.5 0 4) In a few sentences, please describe your ndings from Table 1 above. (1 point)