下記の設問に対する答えとして相応しものを選択肢から選び、次のコードの空欄（##########）を埋めてください．
変数 wine_df の “Flavanoids” 列の分散を算出し、出力してください．
import pandas as pd
wine_df = pd.read_csv(“http://archive.ics.uci.edu/ml/machine-learning-databases/wine/wine.data”, header=None)
wine_col = [”, ‘Alcohol’, “Malic acid”, “Ash”, “Alcalinity of ash”, “Magnesium”, “Total phenols”, “Flavanoids”, “Nonflavanoid phenol”, “Proanthocyanis”,
“Color intensity”, “Hue”, “OD280/0D315 of diluted wines”, “Proline”]
wine_df.columns = wine_col
print(##########)
1. wine_df[Flavanoids”].std()
2. wine_df[Flavanoids”].var()
3. wine_df[Flavanoids”].sample()
4. wine_df[Flavanoids”].median()