ummarize_at(vars(c(bill_length_mm, bill_depth_mm)), sd)`",     label = structure("<code>penguins %&gt;% \n  group_by(year) %&gt;% \n  summarize_at(vars(c(bill_length_mm, bill_depth_mm)), sd)<\u002fcode>", html = TRUE, class = c("html",     "character")), correct = FALSE, message = structure("Not quite. Don&#39;t forget about additional arguments to <code>sd()<\u002fcode> that must be passed through with <code>...<\u002fcode>", html = TRUE, class = c("html",     "character"))), class = c("tutorial_question_a