3. For the following vectors a = [1,-1,-1] and b=[5, 1,2]. Determine a. A vector perpendicular...

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3. For the following vectors a = [1,-1,-1] and b=[5, 1,2]. Determine a. A vector perpendicular to the two vectors. b. The angle between the two vectors. [2] [2] 3. For the following vectors a = [1,-1,-1] and b=[5, 1,2]. Determine a. A vector perpendicular to the two vectors. b. The angle between the two vectors. [2] [2]