It has been a long time since the article was published. The Figure 5 link no longer works. It's now linked to the Imageshack login page.

On my Huawei cellphone, there is a broken image link icon between the lines "In this chapter, all of the examples will be working off of the data in Figure 5 - Comms Data table." and "Figure 5 - Comms Data table". However, on both Edge Version 83.0.478.50 and Firefox 77.0.1, both 64-bit and under Windows 10, there is absolutely nothing between the lines. One cannot tell there is a link there.