The lifetime in minutes of a mechanical component has a Weibull distribution with parameters a = 1.5

Question:

The lifetime in minutes of a mechanical component has a Weibull with parameters a = 1.5 and λ = 0.03.
(a) What are the median, upper quartile. and 99th percentile of the lifetime of a component?
(b) If 500 independent components are considered, what are the expectation and variance of the number of components still operating after 30 minutes? Distribution
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