The lifetime of a transistor in a certain application has a lifetime that is random with probability

Question:

The lifetime of a transistor in a certain application has a lifetime that is random with probability density function

a. Find the mean lifetime.
b. Find the standard deviation of the lifetimes.
c. Find the cumulative distribution function of the lifetime.
d. Find the probability that the lifetime will be less than 12 months.

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...