The data set below contains spending on products ($) during a three-month period by a sample of 15 customers receiving incentives through a mobile loyalty program. Complete parts (a) through (d) below. 55.85 22.82 67.69 46.17 57 37 108.09 50.76 35.17 78.61 50.26 63.73 59.94 41.09 56 09 53.24 a. Compute the mean and median. The mean is]. (Round to two decimal places as needed. Do not include the $ symbol in your answer.)