You are given the original function $Q(x)=x^4{x}^3-4x^{2}1$

Determine which of the following intervals describe where the original function $Q(x)$ is concave down. Values have been rounded to two decimal places.

$(-,-1\mathrm{.}84)(0,1\mathrm{.}09)$

$(-0\mathrm{.}49,0\mathrm{.}57)$

$(-2\mathrm{.}52,-0\mathrm{.}49)(0\mathrm{.}57,1\mathrm{.}44)$

$(-0\mathrm{.}50,0\mathrm{.}00)$

$(-1\mathrm{.}10,0\mathrm{.}60)$