Consider the three points A(71,2, 1), 3(74, 6, 72) and C(74, 4,4}. You are given that, H 3 4} 3 AB = 4 and A0 = 2 3 3 Calculate the quantities below and enter them in the boxes provided using Maple notation. Remember to give exact answers using Maple notation. For 1 example, for 2% enter 2*5qrt {47) and for the vector 2 enter . 3 > > l> The projection of AB onto AC is the vector projEAB = ' ' n IE. The length of the altitude through B in the triangle ABC is l l a