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2. Suppose a lifetime random variable W follows a certain distribution having a hazard 6 rate of the form where B > 0, W 2 8 and 8 > 0. (i) Find the survival function. (ii) Find the mean of lifetime mentioning any required assumption. 3. In a study, some patients were followed until their leukemia returned (relapse). The 7 data in usual notation are given below: 10, 7, 32+, 23, 22, 6, 16, 34+, 32+, 25+, 11+, 20+, 19+, 6, 17+, 35+, 6, 13, 9+, 6+, 10+ (i) Compute an estimated SIQR based on the above data