Can someone help pls?? Thank You

1. Suppose you have three fair six-sided dice. In a random rol, what is the probability that the sum of their numbers will add up to 5 or less? 2. A fair six sided die is rolled until a 6 comes up. What is the expected number of rolls until that happens? 3. Suppose two fair six-sided dice are rolled. What is the probability that they will both come up with the same number