a) Suppose that the random variable X has a discrete distribution represented by the density function, if x= 0,1,2,. f(x) = {2*' another case calculate the value of the constant c. b) Show that there is no number c such that the function, for x = 1,2,. f(x) = another case be a function of probability density. c) Show that there is no number c such that the function, for x>0 f(x) = another case be a function of probability density.