7) Determine a unit vector that is perpendicular to (3, -4). (1 -2 marks) 8) Determine if the points A(4, 1, 3), B(5, 3, 5), C(7, -3, 2) and D(-1, 1, 1) lie on the same plane in 3-space. (1 -4 marks) 9) A vector v has its tail at the point (5, -6) and its tip at the point (-2, -1). Express the vector in algebraic (component) form and draw the corresponding position vector on the given axes. (C -2 marks) A...L.. L.A..L. .1 1----7 45.. +-41- 10) For the vectors u = (1,-3,5), v= (-2,10,-8) and w= (1,-5,4), Sofia, Edward and Victor made the following claims: Sophia Edward Victor I can express i I can express w as a linear as a linear combination of combination of T and w. a and v. I can express v as a linear combination of a and w. State who is correct and who is incorrect. Correct: Incorrect