Suppose f(x) is positive, continuous, and f'(x) < 0 for all z in [ – 8, 4], and / f(x)dx = 76 and %3D | f(z)dz = 21. This problem requires either exact answers, or answers rounded to at least four decimal places. Then The least possible value of f( – 1) is The greatest possible value of f( – 1) is

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