All right, I just wanted to, kind of, give you a preview to part two of the course. In part two, we're going to work more with arrays. So, in part one, you worked with iterating through vectors. And the first thing we're going to do in part two of the course is to iterate through arrays. So, we've got multiple columns and multiple arrays. For example, we can find fives in this array. It says, a five was found in a row one, in column three. It also finds another one in row two, column one, and a third one in row four, column two. So, while this is not tremendously useful, you could apply this to a lot of different scenarios. So you're trying to sort through big arrays to find different things. Next, we're going to work with array functions. And in part one of the course, we did things where we would maybe, sort this vector or shift it, up or down. But, now what we're going to do in part two, we're going to create array functions in which we can create our own user-defined array functions, where we have a function whose input is a an array. And then we can do Control Shift Enter and we can sort that low to high. Instead of just sorting the vector here, we can put it over here in a new range of cells, and this is the sorted vector. We are also going to be working with strings. So, a lot of folks will work with strings. For example, here I can run a search, and we're going to search for just a simple string like ana, and the range to search, I can put in this range and it searches through there. It says, your string was found in row three and column two. Next, you guys are going to learn how to do user forms. So this is a generic user form. It's similar to one of the assignments in the first part of the course. You can put in information here, so this is a really good way to interface with the user in a professional way. You can enter things like the different dimensions for this tank. You can put in the density, and maybe we have five meters in here and we will calculate the mass. So, it's really easy for the user to input the different elements of the problem and run this to find the solution. So that's a basic user form. Another example of a user form might be the following. This relates to assignment five on the first part, so we can put the different elements of our problem in there, and it will then calculate the maximum profit, and the speed at which you need to drive to maximize your profit. Finally, in the very end of part two, you're going to learn how to iterate through different files and bring in information. So, I've got sort of a grade manager example here, where I've got a bunch of students and we have all of their assignments and assessments in the course, and I have five different sections where the TAs for those sections will provide me with individual spreadsheets. So, as an example, I have just a spreadsheet here with the grades from just one section of the course, and I need to then import all of this information, and it has to correspond correctly to the right student with the import that information into the, kind of, the overall grade spreadsheet. And I've got scores from five different sections. So, I can run this, it's a user form, I can update the grades. It asks me to choose the files that have the grades, so these are the five section spreadsheets. It's going to then open up each one of those and it's going to import the data into the main spreadsheet. And so, it imports all the grades, and it says, grades updated. You can also implement a search tool. So, we can search by last name, and I can then see what that student got on that item. I can also change the grades, so I can search through using the last name, and I can change that students grade on a certain assignment. So, this is how you can very easily, and very professionally, work with large sets of data and manage them quite easily. So, in part two of the course, you're going to learn all of the elements required to put together something like this. So, I hope all of you will join me in the second part of the course. Thanks again for joining me for part one.