Access the file PUBLIC TRADING. It contains data for the rate of return (ROR) measured in percentages, a risk level, the amount of the original investment (OIV), whether the stock is traded publically

(entered as a “1” if it is), and the number of years the investor has held the stock. The intent is to develop a model to explain the rate of return to the investor. There is some doubt as to the need to include PUBLIC and YEARS in the model. Offer your suggestion based on the Lagrangian Multiplier.