6 (a) Two of these cards are chosen at random. They are placed next to each other to give a two-digit number. (i) Find the probability that the two-digit number is less than 30. (ii) List all the possible two-digit numbers that are prime. (iii) Find the probability that the two-digit number is a multiple of 4. (b) Rowan throws a dice 200 times. The bar chart shows his results. (i) Use the bar chart to complete the table of results. (ii) Using Rowan’s results, find the relative frequency that he threw a number less than 3. (iii) Rowan says that the dice he has thrown is not a fair dice. Make two comments to explain why the dice may not be fair.