Question 1 a) Find the value(s) of y such that the vectors U₁ = <-6, -5, 5> and u₂ = <-18, y, 15> are parallel. b) Find the value(s) of z such that the angle between the vectors U₁ = <−1, 6, 0> and U₂ = <−7, 42, z> is equal to 30°.

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