Let a = (1, 0, 5, −3, 2), b = (4, 7, 0, 11, 10), and c = (6, 4, 0, 0, −2) be vectors in ℝ5...

Let a = (1, 0, 5, −3, 2), b = (4, 7, 0, 11, 10), and c = (6, 4, 0, 0, −2) be vectors in ℝ5, and let . Indicate which of the following expressions does not make sense, and for those that do, evaluate them.

(a) a + b + c

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(b) ka + c

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(c) ca

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(d) (a · c)b

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(e) b/||kb||

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(f) c · (2b + a)

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(g) a/b

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(h) c/k