Test the following function to find out whether it is a probability function. If it is not, then make it into a probability function. (Give your answers correct to one decimal place.)
R(x) = 0.2, for x = 0, 1, 2, 3, 4
(a) List the distribution of probabilities.
R(0) =
R(1) =
R(2) =
R(3) =
R(4) =