2. A teacher weights student marks in her nal calculation as follows: Knowledge and Understanding, 20%; Application, 15%; Thinking, 20%; Communication, 15%; and the Final Exam, 30%. A student's marks in these categories are 80, 78, 82, and 85, respectively. The nal exam, has not, as yet, been written. a. Calculate the student's term make before the nal exam. [T/6] b. What mark must the student achieve on the nal exam to em a nal grade ofSS'? [TM]