 So these are your announcements for Physics 255 for Monday, February 12th. As a quick reminder, this is going to be a virtual lecture today. So just to give you an overview again, you're going to go on blackboard in today's folder just as you normally would. And you've got your normal pre-lecture, textbook sections, videos, and pre-lecture quiz. But there's a couple of extra things in here. You're going to have some extra virtual lecture videos to watch, and there's going to be some worksheets. Now if you didn't pick up the worksheet on Friday, you can print it out. It's two-sided. So side one and side two is available here on this first slide inside today's lecture folder. As you watch the extra videos, you should be able to fill out the stuff on the worksheets and be prepared to turn that in in class on Tuesday. You shouldn't have to be asking me for an extra copy to fill it in during recitation and then try and get it to me by the end of the day. It should be done when you walk into class for recitation on Tuesday. Also, remember you should be working on sapling. You've had a little bit of a break here with the test, but you've got homework number five. And after today's virtual lecture, you will have all the content for that homework number five. The assignment is due on Friday, and we will practice it a little bit in recitation on Tuesday, but you probably want to go ahead and start working on those homework problems. I'm getting help. Since I will be off campus on Monday, I won't be having office hours, but you can email me. It might take me a little while to get back on emails, or you can send me a text message. I can't guarantee that I will be able to answer you right away on a text message since I might be driving to and from where I'm going to, but I may be able to answer text messages at points throughout the day. I also want to remind you that there's this online tutoring, that smart thinking, tutoring, there's a link on blackboard over on the left hand side. So you might take a look at some of that as well. So those are the announcements for class today. If you've got questions, you can send them to me by email or text message, but otherwise just make sure you go through this material and be ready to turn your problems in on Tuesday.