1. These data come from a Negative Binomial distribution. Write a function to compute the log-likelihood. HINT: You can let log(0) = 0 if required. (4 marks)
2. The Negative Binomial distribution has two parameters, N and p. Using your code from part 1, compute the values of log-likelihood for values of N in the range [10-60] and p in the range [0-1] (e.g. use 50 values). Plot your results as a two-dimensional plot with the value of log-likelihood as the colour (or equivalently, make a contour or three dimensional plot).
3. Compute the maximum of the log-likelihood and find the best-fit values of N and p. Make a plot of the best-fit distribution on top of the histogram from part 3. Comment on your results.

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