3. Construct two new variable: monthly returns of TSX and BTC. Hint: Monthly percentage returns are defined as the price appreciation with respect to the last months prices: R+ = PP-1. You can calculate the returns following the equation or use the percentage change function of Pandas: .pct_change(). Alternatively, you can work with the log return of each month is calculated with respect to the previous months values using the log of prices, i.e. Rt = ln(Pt) In(Pt-1) 3. Construct two new variable: monthly returns of TSX and BTC. Hint: Monthly percentage returns are defined as the price appreciation with respect to the last months prices: R+ = PP-1. You can calculate the returns following the equation or use the percentage change function of Pandas: .pct_change(). Alternatively, you can work with the log return of each month is calculated with respect to the previous months values using the log of prices, i.e. Rt = ln(Pt) In(Pt-1)