answer your question I'll try not to do that again thank you very much for the introduction Aaron thank you everybody for coming today let me tell you a little bit about the format here despite the size of the event I'd still like it to be a little bit interactive and let you feel like you can make the tutorial what you want it to be for yourself I believe a lot that the tutorial should be a chance for you to get some hands-on experience and and to feel like you're building your own mastery of this subject so I've included three exercises