Need help on this:

3. Let X1, X2, ..., An be a random sample from a population with probability density function: 505 if x > 0 f(x|0) = 0, otherwise (a) Find the method of moments estimator OMME of 0; (b) Find the maximum likelihood estimator (MLE) OMLE of 0; (c) Find the bias B( OMLE) of the MLE