Assignment 1: 1. Give a formal or descriptive definition for each of the following terms.  Abstraction hierarchy,  Refinement,  System-level synthesis,  Logic synthesis,  Layout synthesis,  Design window,  Static timing analysis.  ITRS,  Gate-Equivalent,  Technology Nodes,  Feature size,  Behavioral representation,  Structural representation,  Geometrical representation, 2. Access the Internet for information about Daniel D. Gajski’s “Y-chart” design methodology of integrated circuits. According to your investigation of the related research papers and/or technical reports, please summarize the “Y-chart” theory in Chinese, focusing on design abstraction hierarchy and design activities. References must be listed at the end of your report. 3. Summarize in Chinese the main features of SoC design based on the paper “A New Ear in Advanced IC Design” (in less than 500 characters).