Question is attached. I just would like someone to verify whether the answer involves fractions/mixed numbers because I do tend to get antsy when I see them in my work. I wonder if I did it right.

So anyway here is what I got with Gram-Schmidt Process:

With x_{1}, x_{2}, and x_{3}representing the first, second, and third columns of A and v_{1}, v_{2}, and v_{3}representing each vector in the orthogonal basis respectively,

v_{1}= [1 2 0 2] v_{2}= [x_{2}] and v_{3}= [-1 7/6 1/6 -2/3]

Correct? And since we are on the topic, how do I go about finding the QR factorization of A ?