Find the requested approximation for the definite integral using the indicated value of n $.$ Give all ariswers to three decimal places, when necessary.

Find $L_n,R_n,$ and their average.

${\displaystyle \underset{2}{\overset{5}{}}}(x^2-2)dx$;$n=3$

A$.L_3=23$

B$.L_3=27$

$R_3=44R_3=48$

average $=33\mathrm{.}500$

average $=37\mathrm{.}500$

c$.L_3=7\mathrm{.}667$

D$.L_3=44$

$R_3=14\mathrm{.}667$

$R_3=23$

average $=11\mathrm{.}167$

average $=33\mathrm{.}500$L