stimate the Carhart 4-factor model for the Magellan fund by regressing its' excess returns on the four factors (note that the fund returns in the spreadsheet are NOT in excess of the risk-free rate). Use the entire 1968-2016 sample period for this regressions. What does the regression suggest about the investment strategy of this fund? Based on the results from the 4-factor model, is this a good fund to invest in