help with probability,?

Question

a box contains 3 yellow,2blue,4 red pencils, suppose you choose a pencil,replace, then choose another, find the probability of choosing yellow, then red [4/27 or 2/3 or 1/6 or 2/27?
refer to the above; find the probability of choosing blue, then yellow [2/24 or 2/3 or 1/9 or 2/27?
refer to question before this one; suppose you choose a pencil from the box and then choose another pencil without replacing the 1st one, find the probability of choosing blue, then red [6/17 or 1/9 or 8/81 or 1/12? and how is this done to find the results

Answer 1

a box contains 3 yellow,2blue,4 red pencils

choosing yellow = 3/9 = 1/3
choosing red = 4/9
choosing yellow then red = 1/3 * 4/9 = 4/27

choosing blue = 2/9
choosing yellow = 3/9 = 1/3
choosing blue then yellow = 2/9 * 1/3 = 2/27

choosing blue = 2/9
keeping it so there is 8 left: 1 blue, 3 yellow, 2 red
choose red = 4/8 = 1/2
choosing blue keeping it and choosing red = 2/9 * 1/2 = 1/9