(14 marks) Your body needs vitamin D to use calcium when building bones. Vitamin D in the form 25-hydroxy vitamin D is measured in the blood. Here are values measured on a sample of eight adolescent girls aged 11 to 14 years: 30, 34, 39, 36, 36, 31, 20, 28. Complete the following questions. Round your final answers to the third decimal place. a) Find the mean, median, and mode temperature. (6 marks) b) Calculate the standard deviation of the data. (5 marks) c) Find the range of the data. (3 marks)