help pls

1. While HDS was started 40 years ago, its common stock has been publicly traded for the past 25 years. 2. The returns on its equity are calculated as anthmetic retums. 3. The histoncal returns for HOS for 2012 to 2016 are: Civen the preceding date, the overage resized retum on ross stock is The preceding data series represents of hDS shistoncal retures, Eosed on this condusion, the atandard deviation of MDS: historical returns is