5 For the same first column ai, follow the Householder steps to construct ri, W1, U1, and Hj. The second column of H A still needs work, on and below the diagonal (call those two components a2). Follow the same steps to construct r2, W2, U2, and H2 (with first row 1,0,0). Then find H2HA=Q-1A upper triangular R. 5 For the same first column ai, follow the Householder steps to construct ri, W1, U1, and Hj. The second column of H A still needs work, on and below the diagonal (call those two components a2). Follow the same steps to construct r2, W2, U2, and H2 (with first row 1,0,0). Then find H2HA=Q-1A upper triangular R