1. True or False ( 5 points) a) SADT organizes diagrams into a hierarchical structure. Diagrams at the top are more general and diagrams at the bottom are more detailed b) Diagrams A1 and A12 may have different viewpoints c) For the KNN model, different K values may lead to a different class membership of the target sample d) When applying the K-means algorithm, different initializations may lead to different number of steps for the algorithm to converge e) Using a decision tree model to perform classification belongs to supervised learning 2. SADT Questions 2.1 What are ICOM codes? Why do we need them? ( 5 points)