Homework 5 was prepared in a bit of a rush, and there are a couple of oddities about question #2.
If you read the directions carefully, you’ll see that it is anticipated that the sentences in the problem might have more than one interpretation, based on the de re/de dicto distinction. However, when the context is taken into account, most of them are not really ambiguous, but must be either one or the other. Not all, but most.
Writing a paraphrase for a de dicto reading is a challenge, because it’s almost always possible to still come away with a de re interpretation. One way to do this relatively effectively is to use some…or other, as in Some student or other.
Also, at the end of the context for (3), it was supposed to read “She thinks he will win”, but I left out “thinks”.