An ordinary $($fair$)$ die is a cube with the numbers $1$ through $6$ 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 $7.$

Event $B$ : The sum is divisible by $5$ or $6($or both$).$

Round your answers to two decimal places.

$($a$)P(A)=$

$($b$)P(B)=$