https://classroom.github.com/a/W1h4X_LV

**Due: 2020-02-26 by 11:59pm**

- Let \(X_1, \ldots, X_N \sim_{iid} \text{Exponential}(\lambda)\). Calculate the maximum likelihood estimator for \(\lambda\), \(\hat{\lambda}\).

The probability density function for the Exponential distribution is

\[ f(x | \lambda) = \lambda e^{-\lambda x}. \]