Could there be step-by-step answers to explain how to get the answers, please thank you for your help

Returns earned over a civen time period are called realixed returns. Historical data gn realised returns is often used to estimate future results. Analysts across companies use realized stock returns to estimate the risk of a stock. Five vears of realized retums for Blue Larma Mining Lnc. (Blue Lama) are ghen in the following table: Aso note that: 1. While Blue Lama was started 40 vears ago, its common stock has been publicly traded for the past 25 years. 2. The returns on Blue Lama's equity are calculated as arithmetic retums. Given this return data, the averege realized retum on Blue Wama Mining Incis stock is The preceding datu series repeesents a sample of Blue Liama's historical retums. Based on this cancusign, the standard deviation of blue Hama's Nistorical returfs is If investors expect the average realized return on Blue Lama Mining Inc,'s stock from 2016 to 2020 to conkinue into the future, its expected coefinient of variation (CV) is expected to equal