A preliminary behavioral study of the Jingdong black gibbon, a primate endemic to the Wuliang Mountains in China, found that the mean song bout duration in the wet season is 12.59minutes with a standard deviation of 5.31 minutes. Assume that song bout is normally distributed.a. Determine the percentage of song bouts that have a duration one standard deviation to either side of the mean.b. Determine the percentage of song bouts that have a duration two standard deviation to either side of the mean.c. Determine the percentage of song bouts that have a duration three standard deviation to either side of the mean.Click here to view page 1 of the table of areas under the standard normal curve.Click here to view page 2 of the table of areas under the standard normal curvea. The percentage of song bouts within one standard deviation of the mean is 68.27 %.(Round to two decimal places as needed.)b. The percentage of song bouts within two standard deviation of the mean is(Round to two decimal places as needed.)%.....