a$)6\backslash$sigma $.$b$)3\backslash$sigma $.$c$)1\backslash$sigma $.$d$)1\mathrm{.}5\backslash$sigma $.23)$ On a box plot, what percent of the values are within the box?$$a$)25\%$b$)50\%$c$)68\mathrm{.}3\%$d$)75\%$