To produce the string “SCORE”: The given statement is, String quote=”Four score and seven years ago”; To return the substring “score” from the given string, the user can use the method “substring()” as follows, quote.substring(5,10); In the above statement, “5” represents the index of the first occurrence of “s” and “10” represents the index of whitespace after the string “score”...

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In a shopping cart, there are various items, which can either belong to the category of household items or electronic items. The following UML diagram illustrates the relationship between items, household items, and electronic items. //Implementation Class public class ShoppingCart{ public static void main(String[] args){ final int MAX_ITEM = 50; Item cart = new Item[MAX_ITEM]; addItem(cart); // populate the item array printItem(cart); } } Considering that all the data definition classes and the implementation class are complete, which of the following Object-Oriented Programming (OOP) concepts do you need to use in the above context? i) Polymorphism ii) Method Overloading iii) Method Overriding iv) Dynamic Binding v) Abstract Class Explain, using course terminology, how you would use any of the above concepts to model the given scenario.

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Chapter 3.3, Problem 21SCP

Explanation of Solution

To produce the string “SCORE”:

The given statement is,

String quote=”Four score and seven years ago”;

To return the substring “score” from the given string, the user can use the method “substring()” as follows,

quote.substring(5,10);

In the above statement, “5” represents the index of the first occurrence of “s” and “10” represents the index of whitespace after the string “score”...

Explanation of Solution

To produce the string “four years”:

The given statement is,

String quote=”Four score and seven years ago”;

To return the substring “Four” from the given string, the user can use the method “substring()” as follows,

quote.substring(0,4);

In the above statement, “0” represents the index of the character “F” and “4” represents the index of whitespace after the string “Four”.

To convert the string “Four” to “four”, the method “toLowerCase()” is used as follows,

quote.toLowerCase().substring(0,4)

To obtain the substring “years” the below statement is used...

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