Describe the concept of metatables in Lua and how they enable object-oriented programming. Provide an example illustrating the creation and usage of metatables.

Metatables in Lua are a powerful mechanism that allows programmers to modify the behavior of tables, effectively enabling object-oriented programming (OOP) constructs such as encapsulation, inheritance, and polymorphism. Metatables provide a way to define a set of operations or behaviors for a table, allowing us to customize how the table behaves when certain operations are performed on it. In Lua, every table can have a metatable associated with it. The metatable is another table that holds a collection of metamethods—special keys with predefined names that define the behavior of the table when specific operations are applied to it. Metamethods are functions that get called automatically by Lua when certain events or operations occur on a table. Let's illustrate the creation and usage of metatables with an example: ``` lua`-- Create a table local myTable = { x = 10, y = 20 } -- Create....