Show your work and explain your work briefly in full sentences. Final answers without supporting work and explanations will not receive credit. Write cleanly! If your work is not easily readable and intelligible, you will lose points! 1. Do not use the cross product to solve this problem - if you do not know what the cross product is, that's great! Until further notice, the cross product is taboo in MATH 220H. In R3, consider the triangle with vertices A = (1, 4, 2), B = (7, 3,8), and C = (9, 2, 2). (a) Compute the area of the triangle ABC. (b) Find the equation of the plane containing the triangle ABC. (c) Compute the distance from this plane to the point (0, 0, 0). (d) Find the point of the plane containing the triangle ABC which is closest to the point (0, 0,0)