Problem 657 (difficulty: 7/10)

Let \(\displaystyle [a,a+\delta)\subset D(f)\). Put the following quantities in increasing order:

\(\displaystyle \overline{f_+'}(a) \qquad \underline{f_+'}(a) \qquad \Olim_{a+0}\overline{f'} \qquad \Olim_{a+0}\underline{f'} \qquad \Ulim_{a+0}\overline{f'} \qquad \Ulim_{a+0}\underline{f'} \)

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