You are a student working toward an associate's degree to become a paramedic. You
just got your midterm grade for the Paramedic Pharmacology class you're taking and
it is a 91.25, which seems a little low, so you decide to double check. Luckily, you
save all of your tests, so you can use them to figure out your average. However,
when you go back through your tests, you notice that one is missing. Based on the
midterm average, what is the grade for the missing test?
Test grades: {90 88 ? 92}