less Level 2 Communicates for different audiences and purposes with some effectiveness. Uses conventions, vocabulary, and terminology of the discipline with some effectiveness. Level 1 Communicates for different audiences and purposes with limited effectiveness. Uses conventions, vocabulary, and terminology of the discipline with limited effectiveness. Part C: Thinking [10 marks] Please show full solutions for full marks. 21. Points: A(-4, 3, 2), B(-8, 5, 3), and C(4, -2, -2) form a triangle. Find a vector that has a magnitude of one and is perpendicular to the triangle. [3 marks]