There are two urns, each containing an infinite number of balls. In the first urn, 70% of the balls are red and 30% are blue. In the second urn, 70% of the balls are blue and 30% are red. You randomly drew 12 balls from one of the urns (i. n., the first urn or the second urn). Out of the 12 balls, 8 are red and 4 are blue. What is the probability that you drew the balls from the first urn