please Answer .

6. There are 4 persons at a table: three guests and a host. Each of three guests may pass the salt with probability 1/2 to one of the direct neighbors (on the left or on the right), while the host may pass the salt to each of the remaining guests with probability 1/3. At the beginning, the host has the salt cellar. . (3 p.) Find the probability that at the end of the meal the salt cellar will again be at the possession of the host. . (7 p.) Find the probability that the salt cellar will be at the possession of each of the direct neighbors of the host, before it returns for the first time to the host