How would I answer the following two vector questions?

4. Given v = [3,5, -4) and w = [4,-3, -2), determine: (4 marks) a. v w b. wu c. What does the magnitude of w | v depend on? d. What does the direction of w | 7 depend on? 5. Draw diagrams to explain the answers to the following questions. (4 marks) a. Is it possible to have a $ b = 0? b. Is it possible to have a $ 7 undefined? c. Is it possible to have a $ 7 = bla? d. Explain why al c = a (71 2)