A= the 3x3 matrix

[0 1 0]

[1 0 0]

[0 0 3]

I worked out the eigenvalues to be 1, -1, 3. How do i find the 3 eigenvectors, as i need them to find an orthogonal matrix. (because i am asked to orthogonally diagonalize this matrix).. Thanks in advance, help will be much appreciated, i have always been stuck on this, on finding eigen vectors in a 3x3 matrix!