As a result of the credit crunch, a small retail bank wants to better predict and model the likelihood that its larger commercial loans might default. It is developing an internal ratings-based approach to assess its commercial customers. Given this one-year transition matrix, what is the probability that a loan currently rated at B will default over a two-year period? Rating at Beginning of Period A BC A 0.90 Rating at End of Period 0.00 0.15 0.55 B 0.10 0.00 0.75 0.00 0.05 Default 0.00 0.10 0.40