Nataly has a bag which contains 10 limes that she bought from a farmer, the farmer marked each lime with a red and a blue marker, if the lime is marked blue means the lime is seedless, and if the lime is marked red it means that the lime is bitter. The farmer inserted 6 red limes and 4 blue limes. Nataly takes 6 limes without looking, one at a time to make a juice.

What is the probability:

a) Nataly gets the first 3 bitter (Red)

b) Nataly gets 3 seedless (Blue) after "a"

c) Nataly gets 1 lemon.