automobiles.rb

require_relative 'talkative'

class Vehicle
  attr_accessor :engine, :tires
end

class Car < Vehicle
  def initialize
    @tires = 4
  end
end

class Motorcycle < Vehicle
  def initialize
    @tires = 2
  end
end

class TelevisionCar < Car
  include Talkative
end

kitt = TelevisionCar.new
p TelevisionCar.ancestors
p TelevisionCar.superclass

kitt.speak
puts kitt.tires

# c = Car.new
# p Car.superclass
# c.engine = "small"
# p c.engine
#
# m = Motorcycle.new
# p Motorcycle.superclass
# m.engine = "smaller"
# p m.engine

talkative.rb

module Talkative
  def speak
    puts "hello"
  end
end