Identify two user stories that adhere to the “INVEST” principle in agile.
User story 1: As a customer, I want the application to be perfect.
User story: As a customer, I should not be made to wait too long for any page to load.
User story 3: As a customer who has placed an order, I should receive an email notification whenever the order status changes.
User story 4: As a customer I should be able to search for products using keywords (related to brand, category, product name or description) so that I can look for products of my interest.