Question: What is a major strength of Altman's Z Score as a model of PD? What is a major weakness of Altman's Z Score as a model of PD? What is a major strength of transition matrices as a model of PD? What is a major weakness of transition matrices as a model of PD? What is a major strength of Merton's model as a model of PD? What is a major weakness of Merton's Model as a model of PD?