can you do thus problem by hand? thank you!

Walt and Cady Longmire were investing in shares of Wyoming Mining Company. The returns for the stocks during 2017,2018 , and 2019 were 10%,5%, and 23.5%, respectively. At the beginning of 2017 , Walt invested $5,000 in the stocks and he did not make any additional investment in 2018. At the end of 2018 , Walt cashed out his entire investment in Wyoming Mining Company. Meanwhile, his daughter Cady Longmire invested $3,000 in the stocks at the beginning of 2017. She later made no deposit in 2018 but invested an additional $5,000 at the start of 2019 . At the end of 2019, Cady cashed out her entire investment in Wyoming Mining Company. Answer the following: (i) Calculate and interpret Walt's dollar-weighted average return for his 2-year investment in Wyoming Mining Company