I'm usually good at maths but statistics and probability are my worst qualities....

Here's the question:

Two cubical fair dice are thrown, one red and one blue. The scores on their faces are added together. What is the probability that...

a) the total score will be 10 or more given that the red dice shows a 6

b) the total score will be 10 more more given that at least one dice shows a 6

Please help!

Thanks guys