Suppose the fifth survival time is ????5 = 10 weeks and there are 22 patients alive out of 40 who were at risk at time ????5. If ˆ????1 = 0.88, ˆ????2 = 0.86, ˆ????3 = 0.85, ˆ????4 = 0.82, and ˆ????5 = 0.75, compute the Kaplan–Meier estimate of the survival probability at 10 weeks.