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Page 3 of 6 Part 2: Communication [17 marks] 4. The diagram is a rectangular prism. Let u = AB, B = AD and w = AE. Express each vector as a linear combination of u, u and w. [1 mark each] a) EF = b) HB = F H A D G C Completion [1 mark each] Complete each statement. 5. The dot product of any two of the vectors i, j, k is 6. If two vectors are parallel then their dot product equals the product of their 7. An equilibrant vector is the opposite of the 8. The magnitude of vector [a, b, c] is 9. The magnitudes of vector [a, b, c] and vector [- a, - b, - c] are 10. If two vectors are orthogonal then their dot product equals