Column 1 2 3 4 5 6 7 Year Alive at beginning of interval Died during interval Withdrew during interval Effective number exposed to risk of dying during interval Proportion who died during interval Proportion who survived during interval Cumulative Survival 1 1000 268 0 1000 0.268 0.732 0.732 2 732 104 21 725.1 0.144 0.856 0.627 3 607 98 44 585 0.167 0.832 0.522 4 465 75 27 451.5 0.166 0.834 0.435 5 363 34 12 357 0.095 0.905 0.394 b. What is the probability of dying in the third year of follow-up if one survived the 2nd year of follow-up? c. What is the probability of surviving in the 2nd year of follow-up if one survived the 1st year of follow-up? d. What is the cumulative probability of surviving 5 years for this cohort of patients? e. How many people remain in this cohort at the end of 5 years