1. Read Case Study: Cheerful Robin (pp.27-29) andrespond to the following questions only:
   1. List the three DSM-5 domains of adaptive functioning. Then, describe Milena's functioning on each of these three domains.
   2. DSM-5 identifies four levels of severity for children with intellectual disability. Clinicians specify the severity of an intellectual disability based on what? Which level of severity best describes Milena's functioning and why?
   3. What is thebehavioralphenotype for children with Down syndrome? How many aspects of this phenotype does Milena show?
   4. Statistically speaking, what most likely caused Milena's Down syndrome?