An ordinary (fair) die is a cube with the numbers through on the sides (represented by painted spots). Imagine that such a die is rolled twice in succession and that the face values of the two rolls are added together. This sum is recorded as the outcome of a single trial of a random experiment. Compute the probability of each of the following events. Event A : The sum is greater than 9 . Event B : The sum is divisible by 3 or 6 (or both). Write your answers as exact fractions.