4. Which of the following statements is/are true? (A) For a nonzero matrix A E Rx, let P be a matrix that orthogonally projects vectors in R¹ onto the column space of A. Then In- P projects onto the right null space of A. (B) If A € R³x2 has two orthonormal columns, then ATA = 1₂. 00 (C) The orthogonal projection of vectors in R³ onto the column space of A == 02 can 30 000 be obtained by multiplying the vector with the projection matrix P == 001 0 1 0

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