Help me understand the WACC/Beta calculations...

I am having a really really tough time with this. The explanation in the book is poor, and I can't seem to deduce the method from practice questions either.

I'm confused on everything, but one hang-up in particular: why does it seem that Total OPERATING Asset Beta includes pension assets/liabilities? Shouldn't it just include the operating assets/liabilities? So confused.

Thank you in advance to anyone who can help out.