Programming Exercise #1: Circle Class circumference diameter radius Write a class named Circle based on the UML diagram above. You may omit the constructors for now: Circle() and Circle(r: double). 1. What was especially satisfying to you about either the process or the finished product? 2. What did/do you find frustrating about it? 3. What's the one thing that you have seen in your classmates' work or process that you would like to try in your next piece?