he ages of Carla's five cousins are listed below. 10 7 20 12 5 1) Calculate the mean. 10.8 2) Fill in the table below: Fill in the differences of each data value from the mean, then the squared differences. 10 -0.8 0.64 7 -3.8 14.44 20 9.3 84.64 12 1.2 1.44 5 -5.8 33.64 5.80 3) Calculate the population standard deviation ( ). (Please round your answer to two decimal places)