In response to your other questions –
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Occasionally images are wonky. You may need to delete them and re-add them… but you shouldn’t have to re-add them from to the media library. I would re-add one, publish your PeBL, see how it works.
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We can’t do math with variables quite yet, but it’s coming soon. You can report what learners have previously answered by using triggers, variables, and Variable Display interactions.
Just 1) create a variable, 2) create a trigger that changes the value of the variable based on what someone responded in an interaction, and 3) create a Variable Display interaction in the content, which reports the current value of the variable.
Let me know (anyone, not just Emily) if you’d like an example video on that!