Use the Builder design pattern to create $2$ classes: AggressiveWarrior and DefensiveWarrior.

Warriors have $3$ attributes, all integers $($int$)$: level, attack, and defense. Level is required, while attack

and defense are optional.

Aggressive warriors have a default attack of $3$ and a default defense of $2.$

Defensive warriors have a default attack of $2$ and a default defense of $3.$

Warriors must be immutable.

The order of things matters in your class:

Fields

Constructor

Methods

Builder

Builder fields

Builder Constructor

Builder methods

Builder build$()$

Using default visibility is fine where private does not seem to fit. Always try private first, then increase

visibility as needed.

Validation: negative values for level, attack, and defense are all invalid. There are tests for this. Provide the code