Use a calculator to approximate the given expressions.
Round your answers to the nearest hundredth (two decimal places).
If there is no real solution, write DNE.

$\displaystyle {\sqrt[{{5}}]{{{85}}}}$ =

$\displaystyle {\sqrt[{{3}}]{{-{156}}}}$ =

$\displaystyle {\sqrt[{{4}}]{{-{85}}}}$ =

$\displaystyle {\sqrt[{{6}}]{{{156}}}}$ =