These were the questions that i was stuck with when i was doing my probability homework, please help =)

1) A die is rolled twice and the resulting numbers are added

(a) Find the Probability that the sum is seven

(b) What event(s) will give a probability of 1/9?

2) A coin is tossed and a die is rolled.

(a) Find the event(s) that will give a probability of 1/12

(b) Find the event(s) that will give a probability of 1/6

Please explain how to do this question, because i'm seriously stuck :'D

Thanks for all the help!