Hi all, literally no idea where to start....

Recall that the parameter space W is the set of possible values of the parameter vector (p1,p2 . . . , ps). For each of the following statistical models, identify the parameter space, the value of s, and the parameters pi; i = 1, . . . , s.
(a) X ~ Poisson(μ);
(b) X ~ Binomial(r,p);
(c) X ~ Beta(a ,b).