Again, start by loading the NHANES data like in the previous exercise.

library(NHANES)
data(NHANES)

For males between the ages of 40-49, compare systolic blood pressure across race as reported in the Race1 variable. Order the resulting table from lowest to highest average systolic blood pressure. Store the result in a data frame summary_by_race. It should have a Race1 and a mean_BP column.