Probability of rolling 2 dice

Ok so there is this question I have been working on for over 2 hours including reading the whole chapter and going through my notes but it doesn't really sseem to make sense to me:

http://i207.photobucket.com/albums/b.../questiona.jpg

http://i207.photobucket.com/albums/b.../questionb.jpg

This is what i've done so far:

So P(B and D) I have 6/18 because thats how much of B there is in D right? or is it P(B) multiply P(D)? but still I don't understand when it asks P(B and D) = P(B) because isn't P(B) just 6/36? which isn't the same as 6/18?

If anyone could help me please :confused: