Terrier News is a monthly newsletter devoted to various breeds of terriers and topics of interest to terrier owners and breeders. Annie West, the editor and publisher, asked you to help her design a system to enter and manage the hundreds of classified ads that Terrier News publishes. Some ads are for dogs wanted; some are for dogs for sale; and some offer products and services. Tasks 1. Design a suitable source document for ads that are telephoned or mailed in. 2. Explain user-centered design principles in a brief memo to Annie. 3. Suggest at least four user interface design guidelines for the new system. 4. Create a switchboard for the new system. Include 3 different features. See Rule 5 on pages 245-247.