25. Find the area of the triangle whose vertices are (0, 1, 2), (3, 4, 5), and (- 1, - 1, 0). 26. Find the area of the triangle whose vertices are (0, 1, 2), (1, 1, 1), and (2, 1, 0). 27. Find the area of the triangle whose vertices are (0, 0, 0), (0, - 1, 1), and (0, 1, - 1).Exercises for Section 13.5 Calculate the cross products in Exercises 1-10. 1. (i- j +k) x (j - k). 2. ix(j - k). 3. (i+ j) x [(k - j) + (3j - 2i + k)]. 4. (ai + j - k) xi. 5. [(31 + 2j) x 3j] x (2i - j + k). 6. (ixj) x (i+ j+k). 7. (i + 2j + 3k) x (i + 3k). 8. (it j + k) x (i +k). 9. (it k) x (i +j +k).Find a unit vector orthogonal to the pairs of vectors in 28. Exercises 15-18. 15. i and i + j + k. 29 16. i - j and i + j. 17. i - j - k and 2i - 2j + k. 30