someone help me with this problem

It's my linear algebra questions, it's for myself. I don't know how to do it

(13) (10pts) Let W = Spanfu, v}, and write y as the sum of a vector in W and a vector in W - if u = - V = 2(14) (15pts) Perform the Gram-Schmidt orthogonalization process on the vectors aj, az, and a, and normalize the results to find an orthonormal basis for Span {aj, a2, as} when 2 89 =\f