How do I do this probability homework problem?

I actually have no clue how to do this. Any help would greatly be appreciated. Thanks!

Suppose we toss two fair dice. Let X = i+j, where i is the outcome of the first die, and j is the outcome of the second die, with i, j ∈ {1, 2, 3, 4, 5, 6}. 

Let p(x) = P(X=x) be the probability mass function of X.

p(2) =  

p(3) =  

p(4) =  

p(5) =  

p(6) =  

p(7) =  

p(8) =  

p(9) =  

p(10) =  

p(11) =  

p(12) =