Refer to the information provided in Figure 18.1 below to answer the question(s) that follow. 
Figure 18.1
-Refer to Figure 18.1. The second-wealthiest fifth of families earned ________% of income in Outland.
Definitions:
Parameters
Variables that are specified in the definition of methods/function, representing the data that needs to be passed into these methods/functions when they are called.
Abstract Method
A method declared in an abstract class that has no implementation and must be overridden by subclasses.
Private Modifier
A keyword in object-oriented programming languages that restricts the visibility of a class member, making it accessible only within the same class.
Concrete Class
A class in object-oriented programming that can be instantiated, as opposed to an abstract class, and provides implementations for all its methods.
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