Let y = f(x) be a function differentiable on R with f(0) = 7. If for every x € R, we have d -f(x) ≤ 5, dx which ones of the following statements must be true? f(8) ≤ 38 ☐ f(9) ≥ 53. □f(6) ≥ 31. ☐ f(7) ≤ 42 27 ≤ f(5) ≤ 32. 4 ≤

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