I am working through several questions for a business statistics (quantitative fin risk) course. Can someone provide me with a detailed way to figure out this question (or a similar one) so that I can better understand it. I missed a large part of the course due to illness. Just catching up now.

2. Simulation of Double Exponential with mean zero and variance one. A double exponential random variable, X, has probability density function fx (1) = ze-kl, -00