If you can provide some explanation to the calculation (finance calculator if possible). It would be appreciated. Before Mrs. Smith arrives, you study her account file and notice she has different investments: 1. A promissory note entitling her to receive a lump sum of $100,000, 5 year from today. Similar notes today yield 5% per year. 2. An insurance settlement that will pay her $1,200 per month for the next 40 months. A finance company, GJ Worthless, is willing to buy this settlement from her today as long as it can obtain a yield of 0.85% per month on its investment. 3. A retirement account that has always paid an APR of 6% per year (0.5% per month) compounded monthly, into which she has deposited $310 at the end of every month for the last 10 years. 4. 50 shares of a stock that will pay a $25 quarterly dividend (per share) three months from today and is expected to continue paying the same $25 per quarter forever. Similar investments today are priced to yield 1.25% per quarter