Well paid project on English grammar - natives, degree level

Hello, This job is for native English speakers only (UK, North America, Australia please) with an excellent grasp of English grammar. Degree in linguistics or English language necessary. We're setting a grammar test for foreign students attending a camp. The test has 39 questions total. We have written this exam ourselves, along with an answer sheet but we need the test proof-answered to an absolute tee to ensure accuracy and standardisation. The questions require only short answers relating to tense and function but accuracy must be totally consistent and accurate. Sub-standard work will simply be rejected immediately including any blatantly incorrect answers (if we see this at all we will decline to work with you). Typical question e.g.: 'You like Peter, don't you?' Write the sentence structure and function. Most other questions pertain to structure, tense, form and function. This is time-pressed, we need a completed sheet within 6 hours. If you're very strong in English grammar you can earn yourself $40 here for 30 minutes work. Please tell us about your credentials in PMB, including an obvious demonstration of your grammar skill!