Excel functions in Grasshopper plugin

In this tutorial, I want to show three quite easy situations that can be automated in Excel using the Grasshopper plug-in. These situations are very basic but I hope you will get an idea of how to use it and upgrade it to your more complex problem. I know that you can solve these problems using Excel built-in macros and using VBA, but this time I wanna show you how to do it using the Grasshopper plug-in. Additionally-data that you get from excel can be transferred to all these compatible software and also reversed-data from software can be exported to excel.