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.

1. 0.9094
2. 0.9154
3. 0.92
4. 0.952
5. 0.9527
6. 0.9627