please answer the problem below and show all work. It is assumed that you can calculate values of any function you need with excel, or online program/calculator if necessary.

1. The mean and standard deviation of the lifetime of a semiconductor laser (in hours) are equal to 3380 and 1800 hours, respectively. Find the lifetime exceeded by 99% of all such lasers assuming the lifetime follows a lognorrnal distribution. Hint: it is easier to nd the parameter to rst making use of the relation Std(X) = E(X)\\/e\"'2 1