Question: Let a 1 = [ 1 2 0 ] and a 2 = [ - 2 1 - 2 ] . Find a unit vector

Let a1=[120] and a2=[-21-2]. Find a unit vector hat(a) which is perpendicular to both a1 and a2.
Let a1=[120] and a2=[-21-2]. Find a unit vector hat(a) which is

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