Fixed income reading 23 exhibit 10

I’m drawing a blank! Does anyone know how they calculated portfolio 1 and 2 “partial or key rate PVBPs” for each year? I tried doing what the bottom note said but i’m getting different answers.

In the same reading, there is a Blue Box named “How Partials are Calculated?” after Exhibit 23.

It mentions how to calculate the partials, but I found quite confusing.

I also came up with different doing the calculation at the bottom of exhibit 10. I guess this calculation works only for total duration.