The lifetime (in days) of a certain electronic component that operates in a high-temperature environment is lognormally distributed with μ = 1.2 and σ = 0.4. a) Find the mean lifetime. b) Find the...

The lifetime (in days) of a certain electronic component that operates in a high-temperature environment is lognormally distributed with μ = 1.2 and σ = 0.4. a) Find the mean lifetime. b) Find the probability that a component lasts between three and six days. c) Find the median lifetime. d) Find the 90th percentile of the lifetimes.