For a distribution with mean 0 and standard deviation > 0, the coefficient of

For a distribution with mean μ ≠ 0 and standard deviation σ > 0, the coefficient of variation of the distribution is defined as σ/|μ|. Consider again the problem described in Exercise 12, and suppose that the coefficient of variation of the prior gamma distribution of θ is 2.What is the smallest number of customers that must be observed in order to reduce the coefficient of variation of the posterior distribution to 0.1?