At Ace College, students can check out up to 10 books at a time but must have at least 1 book checked out at any given time. Consider two tables structured as follows in the dbmodels.py file: from app import db class Student(db.Model): id = db.Column(db.Integer, primary_key=True) LastName =db.Column(db.String(64)) FirstName = db.Column(db.String(34)) email = db.Column(db.String(120), index=True, unique=True) class Book(db.Model): id = db.Column(db.Integer, primary_key=True) model = db.Column(db.String(64),index = True) What is the cardinality of the Student-Book relationship? One-to-many One-to-one Many-to-many Many-to-one QUESTION 15 Suppose that Juan is working on a web app using the current Python and Flask versions. However, he is concerned that new versions of Flask and Python that get released in the future may break his application. From below, what is the most preferred solution to his worries? Create a virtual environment for the app and activate it when working on the app. Save a different version of the app whenever new Flask version is released. He should not be concerned because Python and Flask are backward-compatible, so newer versions will not break his app. Don't upgrade to the newer versions of Flask and Python until he's done with the app