12. (07.04 HC) Vectors u = -4(cos 60 i + sin60 j), v = 8(cos 135.i + sin135.j), and w = 12(cos 150'i + sin150*j) are given. Use exact values when evaluating sine and cosine. Part A: Convert the vectors to component form and find -7(u . v). Show every step of your work. (4 points) Part B: Convert the vectors to component form and use the dot product to determine if u and w are parallel, orthogonal, or neither. Justify your answer. (6 points) B U Font Family AAA DEVE