In each round of a certain game a player can score 1, 2 or 3 only. Copy and complete the table which shows the scores and two of the respective probabilities of these being scored in a single round. Score 1 2 3 Probability $

Draw a tree diagram to show all the possible total scores and their respective probabilities after a player has completed two rounds. Find the probability that a player has

(a) a score of 4 after two rounds,

(b) an odd number score after two rounds. (L. Additional)