Red and blue balls are placed in two urns. One urn contains 5 red balls and 8 blue balls and the other urn contains 6 red balls and 4 blue balls. Two balls are randomly selected from each urn.

Determine the probability that two balls of differing colors are observed.

• 0.87
• 0.89
• 0.91
• 0.93
• 0.95
• 0.97