$1$ VaR for an exponential distribution

$1.$ Assume an asset value in $10$ days follows an exponential distribution with mean $\backslash ($ W$\_\{0\}\backslash ).$ Derive a formula for the value$-$at$-$risk for confidence $\backslash ($ c $\backslash )$ and reference level $\backslash ($ W$\_\{0\}\backslash )$ for the asset. Apply with $\backslash ($ W$\_\{0\}=50\backslash )$ and $\backslash ($ c$=98\backslash \%\backslash ).$

$2.$ Now assume you are short this asset. Compute your value$-$at$-$risk for confidence $\backslash ($ c $\backslash )$ and apply with the same numerical values.

$3.$ Comment on the similarity or difference between the results in the two questions.

$4.$ Repeat the previous questions with expected shortfall.