Hello Mase and Meredith --
You know, Bear #1 and Bear #3 MIGHT be Irving and Muktuk...or they might be bears who happen to be a lot LIKE Irving and Muktuk. You see, the problem is this: To us humans, polar bears look very much alike. We can tell them apart, but not always. Of course, bears have no trouble knowing who is who. So, if I were a bear, I could definitely answer your question. But there is this...sometimes bears will refuse to answer questions. Besides, I am not a bear. It's complicated, isn't it? I think we have to decide for ourselves if we think Bear #1 and Bear #3 are Irving and Muktuk. You are very good readers to have noticed this problem.