1. Suppose that X1, ..., X, are iid distributed as Gamma(o, B) random variables where o >0 is the shape parameter and 8 > 0 is the rate parameter, i.e., the probability density function of X ~ Gamma(o, B) is given by f(x | Q, B) = ro-le-Br I >0. Derive the method of moments estimator for a and B