Color X ink is created by blending red, blue, green, and yellow inks in the ratio 6 : 5 : 2 : 2. What is the number of liters of green ink that was used to create a certain batch of color X ink?
(1)The amount of red ink used to create the batch is 2 liters more than the amount of blue ink used to create the batch.
(2)The batch consists of 30 liters of color X ink.