Using these data, estimate the average monthly return and the volatility for each stock. January - 1.80% 2.00% February 4.20% 1.50% March 1.23% - 6.90% April 3.40% -0.70% May 1.90% 9.00% June 0.70% - 1.30% July 6.30% 2.30% August - 0.50% 8.10% September 0.10% 0.00% October 1.90% 2.90% November - 0.50% 5.60% December 4.20% 0.20%