Let Xmean be the mean of a set of data with individual elements Xi. What is the sum of the deviations, where deviation is defined as (Xi−Xmean), for the set of data {7,4,6,4,9}? −1

0

4.5

6

9

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?