FedEx prides itself on having up-to-date information on the processing and current location of each shipped item. To do this, FedEx relies on a company-wide information system. Shipped items are the heart of the FedEx product tracking information system. Shipped items can be characterized by item number (unique), weight, dimensions, insurance amount, destination, and final delivery date. Shipped items are received into the FedEx system at a single retail center.

Retail centers are characterized by their type, uniqueID, and address. Shipped items make their way to their destination via one or more standard FedEx transportation events (i. e., flights, truck deliveries). These transportation events are characterized by a unique scheduleNumber, a type (e. g., flight, truck), and a deliveryRoute.

3.1 For the above problem, draw an entity relationship diagram with appropriate cardinalities (including lower and upper bounds) associated with the relationships. (20 points)

3.2 Based on the entity relationship diagram, create a relational model (in 3rd normal form). Identify any needed primary and foreign keys and draw the relationship lines between the specific attributes in each entity that are associated with the relationship. (20 points)

This question involves a class named textfile that represents a text file. public class textfile { private string filename; private string filename; private arraylist words; // constructors not shown // postcondition: returns the number of bytes in this file public int filesize() { } // precondition: 0 < = index < words.size() // postcondition: removes numwords words from the words arraylist beginning at // index. public void deletewords(int index, int numwords) { } // precondition: 0 < = index < = words.size() // postcondition: adds elements from newwords array to words arraylist beginning // at index. pub lic voidaddwords(int index, string[] newwords) { } // other methods not shown } complete the filesize() method. the filesize() is computed in bytes. in a text file, each character in each word counts as one byte. in addition, there is a space in between each word in the words arraylist, and each of those spaces also counts as one byte. for example, suppose the words arraylist stores the following words: { mary had a little lamb; its fleece was white as snow. } the filesize() method would compute 4 + 3 + 1 + 6 + 5 + 4 + 6 + 3 + 5 + 2 + 5 as the sum of the lengths of each string in the arraylist. the value returned would be this sum plus 10, because there would also be 10 spaces in between the 11 words. complete the filesize() method below: // postcondition: returns the number of bytes in this file public int filesize() { }