Non parametric statistic

3) The following are the blood glucose levels of 12 patients who attend St. Thomas Hospital: 86 100 120 90 101 98 109 108 93 107 99 110 Perform the Wilcoxon signed ranks test to determine if we can conclude on the basis of these data that the average glucose level in the population is greater than 96 mg/dl? Take a = 0.05