Question 1 Find the value(s) of y such that the vectors u₁ = <-9, 2, - 8> and u₂ = <45, y, 40> are parallel. a b) Find the value(s) of z such that the angle between the vectors U₁ = <2, 4, 0> and U₂ = <12, 24, z> is equal to 30°.

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