There is a Pandas series named mean_c: country_code AFG 38.682 AGO 44.554 ALB 74.068 AND NaN ARE 68.607 ARG 78.796 ARM 72.590 ATG NaN AUS 90.716 AUT 88.413 Write a function that sorts them in descending numerical order
mean_c.sort_values(ascending=False)