1. The problem statement, all variables and given/known data So I think I found an error in the solution were it attempts to find q_2^ I'm asked find the orthornomal basis for the column space of matrix A. 2. Relevant equations 3. The attempt at a solution My question is in what it puts for q_2^ A_2 = [4/3 4/3 -2/3]^T ||A_2|| = sqrt((4/3)^2 + (4/3)^2 + (-2/3)^2) = 2 but in the answer key since q_2 = A_2/||A_2|| it's implying that ||A_2|| = 3 but I calculate 2. Am I doing something wrong? Thanks for your help.