Frontier Molecular Orbital Theory Problem

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Summary: How do I draw the HOMO of HO-. The problem asks about the HOMO of HO- interacting in different ways with the LUMO of H-Cl. I cannot proceed with the question without figuring out how to draw the HOMO of HO-. I have attached pictures.

Hello All,
I have been struggling with this problem for some time now. My teacher and book has shown us how to draw MO's with just 1 set of valence electrons, so it is a sort of condensed MO diagram (just a heads up). I am confused on how my book is drawing the HOMO (highest occupied molecular orbital) for HO-.
I have attached my work for what I think the HOMO is, but the books answer is completely different and it has completely stopped me cold in my tracks from progressing.
Any help would be much appreciated.
 

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