I need your help!

(a) Bottle 1 consists of 4 red balls and 6 blue balls. Bottle 2 consists of some unknown number of red balls and 12 blue balls. One ball is drawn from each bottle. The probability that both balls are red or both balls are blue is 0.56. Find the number of red balls in bottle 2?
Let the number of blue balls in Bottle 2 be n. Express the probability P of drawing {(a red ball from B1 and a red ball from B2) or (a blue ball from B1 and a blue ball from B2)} in terms of n. Then solve P = 0.56 for n.