Please help me to understand this problem:

Results for this submission I Entered I Answer Preview I Result I Message You have entered [0107106781186547,0,0.707106781186547], 1 1 3V 13 'V 13 3V 13 _ [ , 0, L [ , , ] vector(s) which are not [-3.82426463519459,2.54950975679639,3.82426463519459] V; 2V? '5 2V5 of unit length. The answer above is NOT correct. (1 point) Find an orthonormal basis of the plane x1 + 3x; X3 = O. Answer: 101 NEVEsx/E Ix/E'H/EI' z''z To enter a basis into WeBWorK, place the entries of each vector inside of brackets, and enter a list of these vectors, separated by commas. For instance, 1 1 if your basis is 2 , 1 , then you would enter [1 ,2,3],[1,1 ,1] into the answer blank. 3 1