$($b$)$ Compute the effect size for the expression values of the first $2000$ genes using AML

patients in the golub data.

$($c$)$ Create a histogram of the effect sizes in part $($b$).$

$($d$)$ Give the $3$ largest effect sizes found in $($b$)$ and the gene names $($found in the second column of golub.gnames$)$ for the $3$ largest effect sizes.