2. (10 scores) Assume that a continuous random variable X has the following cumulative 0, x<0, distribution function (CDF) as Fx(x) = {Ax3, OSX<1, 1, x 1, (1) Find the value of A. (2) Calculate the probability that X is between 0.1 and 0.5, (3) Find a possible probability density function fx(x) (pdf) of X.