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Test: Test 1 Find the equation of the sphere passing through P( - 2, 3, 8) and Q(4, -7, 9) with its center at the midpoint of PQ. The standard equation of the sphere is (Simplify your answer.)2 Test: Test 1 Question 12 of 14 Compute the dot product of the vectors u and v, and nd the angle between the vectors. u = (13,o,5} and v = {1,3,4}. <: the dot product of vectors is e an integer or a simplified fraction angle between d your answer in degrees. do not round until final answer. then to nearest hundredth as needed.>