A box contains 5 red marbles, 8 white marbles, and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be

**(i)** red?

**(ii)** white?

**(iii)** not green?

**(i)** red?

**(ii)** white?

**(iii)** not green?