Compute a x b, where a = i – 2j + 5k, b = 2i +j+ 3k. (Write your solution using the standard basis vectors i, j, and k. Use symbolic notation and fractions where needed.) a x b = | 6 -5 9| Find the area of the parallelogram with sides a = 7i + 2j + k and b = 4i + 3j + k. (Express numbers in exact form. Use symbolic notation and fractions where needed.) area =

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