$1)$

f$\text{'}\{5$:$\mathrm{.}1$f$\}\text{'}$

$\text{'}5.\text{'}$

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$2)$

f$\text{'}\{5$:$\mathrm{.}3$f$\}\text{'}$

$\text{'}5.\text{'}$

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$3)$

f$\text{'}\{5\mathrm{.}25$:$\mathrm{.}3$f$\}\text{'}$

$\text{'}\text{'}$

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$4)$

f$\text{'}\{5\mathrm{.}2589$:$\mathrm{.}3$f$\}\text{'}$

$\text{'}\text{'}$

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$5)$

f$\text{'}\{5$:$4\mathrm{.}1$f$\}\text{'}$

$\text{'}\text{'}$

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