Decide in each case whether the hypothesis is simple or composite:
(a) the hypothesis that a random variable has a gamma distribution with α = 3 and β = 2;
(b) the hypothesis
that a random variable has a gamma distribution with α = 3 and β 
2;
(c) the hypothesis that a random variable has an exponential density; (d) the hypothesis that a random variable has a beta distribution with the mean μ = 0.50.