$5.$ Choose the top $5$ companies in terms of ESG score from dfASX$20,$ and save the dataframe as dfASX$5.$ Print out dfASX$5.$

$6.$ Use yfinance package to obtain the monthly share price data for those $5$ companies from Yahoo! Finance for the period December $2021$ March $2024($named as df$),$ and calculate the monthly returns $($percentage return$)($named as dfr$).$

$7.$ For each stock, normalize the stock price to $$1$ at the beginning of the period. Then visualize the time$-$series movement of the normalized stock prices of those $5$ companies in one graph.

$8.$ Show the summary statistics of the returns of those $5$ stocks. Use the bar plot to visualize the average returns of those $5$ stocks. Show the correlation matrix of the returns of those $5$ stocks.

Visualize the correlations using heatmap.