$($d$)$ Compute the matrix ${\stackrel{}{x}}^{**}$ of sample means within groups using the standardized

values, display.

$($e$)$ Compute the distance matrix $\frac{?}{\text{b}\text{a}\text{r}}(D{)}^{**}$ between the groups using the standardized values,

display.

I was confused part $($d$)$

I made $3$ ways for coding so can you tell me which one right way or tell me right code

pro$\_$edata $\%>\%$

group$\_$by$($Group$)\%>\%$

mutate$($across$($B:F$,$ stand$))\%>\%$

group$\_$by$($Group$)\%>\%$

summarise$($across$($B:F$,$ mean$))$

pro$\_$e

pro$\_$edata $\%>\%$

group$\_$by$($Group$)\%>\%$

mutate$($across$($B:F$,$ stand$))\%>\%$

summarise$($across$($B:F$,$ mean$))$

pro$\_$e$1$

mean$\_$valuedata $\%>\%$

mutate$($across$($B:F$,$ stand$))\%>\%$

group$\_$by$($Group$)\%>\%$

summarise$($across$($B:F$,$ mean$))$

mean$\_$value