7 please show work for excel

Investor B also has the option of either investment X or Y, but Investor B is very risk adverse. Using the same information from question 1 and the expected rates of return (ERR) that you determined on these options: Complete the calculations to determine the variance and resulting standard deviation of those two assets. Provide the standard deviation of Investor B's choice of investment. The methodologies to complete the variance and standard deviation are found on pages 360-361 in your text or slides 10&11 from the speaker notes. Proof of work required. Carry your standard deviation to two (2) decimal points; .0625 recorded as 6.25