Exercise 4.11.1 determine whether the following set of vectors is orthogonal. if it is orthogonal, determine whether it is also orthonormal.   1 6 √ 2 √ 3 1 3 √ 2 √ 3 − 1 6 √ 2 √ 3  ,   1 2 √ 2 0 1 2 √ 2  ,   − 1 3 √ 3 1 3 √ 3 1 3 √ 3   if the set of vectors is orthogonal but not orthonormal, give an orthonormal set of vectors which has the same span