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Projections 2 points possible (graded) 01 Recall from linear algebra the definition of the projection of one vector onto another. As before, we have 3dimenslonal vectors x\") = a2 and 13 11 x(2) = a2 03 Which of these vectors is in the same direction as the projection of x\") onto xa)? - x - x - x+ xa) What is the signed magnitude c of the projection px(1)_,X(2j of x\") onto x0)? More precisely, let u be the unit vector in the direction of the correct choice above, find a number c such thatpxmaxa) = cu. (Enter a_1 for al, a_2 for a2, and a_3 for 03.) c: Dot Products and Orthogonality 0/1 point (graded) (11 01 Given 3dimensional vectors x\") = a2 and x0) = a2 , when is x\") orthogonal to xa), i.e. the angle between them is 71/2? (13 03 0 when 2m + 2a3 = 0 - 2 2 2 whenala2+tl30 2 2 2_ whena1+a2+1130 STANDARD NOTATION | Smeit You have used 'I of 2 attempts Save Unit Vectors 1 point possible (graded) A unit vector is a vector with length 1. The length of a vector is also called its norm. Given any vector x, write down the unit vector pointing in the same direction as x? (Enter x for the vector x, and norm(x) for the norm ||x|| of the vector x.)