Recently, you've noticed that your 10-yr-old vacuum cleaner is not picking up the animal fur from your carpet as it has in the past. You have decided to invest in a new vacuum cleaner. Before you make a decision on which model to purchase from manufacturer XYZ, your neighbors offer to let you use their vacuums to help you in your decision process. Neighbors A has a vacuum made by manufacturer XYZ and is 5years old. Neighbor B has vacuum made by manufacturer XYZ and is a new model that has just been released. Formulate a testable hypothesis design an experiment to test, & include your controls. Be specific in your experiment design.