The figure below shows a regular hexagon with point O as the origin and orthogonal axes x and y. The position vectors of A (OA) and B (OB) are a and b as shown with the magnitude of vector b given as 17.9. Determine the magnitude vector a (OA). Y C Answer: b D E X Determine the magnitude of the vector projection of vector OD on vector OB Answer: Determine the the dot product of vectors OB and OA. Answer: Determine the angle between vectors OB and OA in degrees. Answer: Determine the magnitude of the cross product of vector OE and vector OB. Answer: