A stock has an expected return of 19.64% and a standard deviation of 19.53%. Compute the following for this stock (Please write all answers as percentages (e.g .1234 should be written as 12.34 ): 1. Upper range of 68% confidence interval: % 2. Lower range of 68% confidence interval: %. 3. Upper range of 95% confidence interval: % 4. Lower range of 95% confidence interval: % 5. Upper range of 99% confidence interval: % 6. Lower range of 99% confidence interval: %