4. For the vector u = (2, 7, -1, 20) and vector v = (3, -1, 9, -10): a. Find the product uv. b. Find the length of u + v. c. Which of the following are the elements of the normalized u + v? Choose ALL the elements in any order. a. 0.56666... b. 0.5 c. 0.66666... d. 0.46666... e. 0.333333... f. 0.6 g. 0.8 h. 0.4 i. 0.53333...

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