Uh, So we have a model here for the percent of generic drugs that are, um, being given as generics by CBS, and we have a peaceful eyes function, so we have to linear equations, and you just write it down. And we know that this top linear model is used when our time frame is from 8 to 11 and are bottom one is used when our time frame is from 12 to 14 and so on. And this one is corresponding with 2008 this 1, 2014 and everything in between. And we want to write those down. We want to find out what they are. So we have for 2008, 9, 10, 11, 12, 13, 14. And so I'm going into my calculator. And I'm putting Weiss of one as my first model 2.77 x plus the 45.2. And then why so, too? I'm plugging in 1.95 x plus 55.9, and then I'm going to make a table to table set and I'm going to start my table. The start at eight, and I'm gonna have it go up by ones, and I got that table in front of me now. And so now I know this is the percent that they would have during these different years. And so for the first model I need to use for 89 10, 11, I need to use my top linear model. And so for me, I'm going to write down the results of my wife's of one equation. So I get 67 0.36%. I get 70 0.13% for 10 2010 72.9% for 11. I get 75.67% and now I need to switch to my other model because my other model is for when I'm at 12 so I can look at my wife's up to for 12. And that gives me 79.3% for 13. That up just a tad bit. I have 81.25%. And then for my last one, I have 83.2% are generics. So again, you just have ah piece wise function in your domain to use Here is the eight through 11 and your domain to use for the second function is the 12 through 14, and using a table is very, very helpful rather than just plugging things in.