A mortality study is conducted on 12 individuals of age x initially. You are given: (i) In addition to the 12 individuals of age x, one individual apiece enters the study at ages x + 0.4, x + 0.8 and x + 1.0. (ii) One individual leaves the study alive at age x + 1.2. (iii) One individual leaves the study alive at age x + 1.4 (iv) One death apiece occurs at ages x + 0.3, x + 1.3, and x + 1.6. (v) Two deaths occur at age x + 0.5. The duration of the study is 2 years. (a) Estimate the probability that a life age x would survive 2 years using (i) Kaplan-Meier estimator; (ii) Nelson-Aalen estimator