I need help with the problems on the following attached page, Thanks!

Problem 3 Your student scored on a standardized test In the 15" percentile when rated against your class, but in the BY" percentile when rated against students nationally. Does this mean your student did poorly, decently, or well? What does this drastic change in percentile score wary about your class? Problem 4 You have promised your class that the top two scorers on an upcoming test receive a prize. You have members in your class that are taking a standard test, some that are taking a remediation course, and some that are taking a gifted course. Each test has a different grading scale and a varying level of difficulty, so you want to be fair to the students taking the harder tests. The remediation class test is on a scale from 0-30, with a mean of 18.1 and a standard deviation of 6.2. The standard class test in on a scale from 0-100, with a mean of 75 and a standard deviation of 9.7. The gifted class test is on a scale from 0-600, with a mean of 456.6 and a standard deviation of 78.7. Remediation Standard Gifted 580 451 166 562 54 495 83 435 457 445 319 365 Which two scores will receive the prize? (Hint: You don't need to find 30 z-scores here!)