3. Calculate the area of the parallelogram whose adjacent sides are: {1' = [6, 3, -2] and 5 = [1, 3, -1] i4] 9. The points A[1,1.1], B[2. 0, 3], and C[3. 3. 4]. Show that this triangle is a right-angle triangle. [3] 10. Determine the following: a) Determine the vector equation of the plane that contains the following two lines L1: r = (2,3,5) + t(3.1. 5).:5R [2] L2: r = (2,3,5) 4- s(0,4,3),scR b) Determine the corresponding Cartesian equation. [5]