answers and so you'll know exactly what the questions can be and what the answers are that we expect you to get so that will come out later today or tomorrow for you to study link pause here and see if there's any questions about logistics oh and by the way this lecture is recorded so for some reason you you know don't like your voice to be heard just like with the in-class lectures that were recorded then please be aware of that alright then let's get started with the Contin first day so compression what is