Please Answer

A group of ten patients diagnosed with rectal cancer took part In a small study and were followed up from the time of diagnosis. The outcome of Interest was 'time until death {in days}'. The su nrlual times for the lit participants are given below, with censored observations denoted by an asterisk l'}: 159', 355',1E|24", 533', 655*, 91-31", 283, 355, 182, #90 a} Based on these data, calculate the Kaplan-Meler estimate of the sunrhror function, where the outcome of interest is 'time until death'. [3] b} Using your answer to at calculate the probability of surviving less than a year. {1]