Morningstar publishes information on 1208 company stocks. A sample of 40 of these stocks is contained in the Excel Online file below. Construct a spreadsheet to answer the following questions. Open spreadsheet a. Develop a point estimate of the proportion of the stocks that receive Morningstar's highest rating of 5 Stars. 0 {to 2 decimals) b. Develop a point estimate of the proportion of the Morningstar stocks that are rated low with respect to business risk. {to 2 decimals) c. Develop a point estimate of the proportion of the Morningstar stocks that are rated 3 Stars or less. (to 2 decimals)