What is formula is needed to solve this?

UEB Paste BIU- A- Cells Editing Alignment Number Conditional Format as Cell Formatting Table Styles Styles Clipboard Font A1 X fx A B D E F G H I 5 6 7 Return Deviation Squared Deviation Product Product 8 Stock A Probability Recession 0.20 Normal 0.55 Boom 0.25 9 Return 0.05 0.08 0.13 E(R) = 10 11 Variance = 12 13 Standard Deviation = 14 15 16 Return Deviation Squared Deviation Product Product 17 Stock B Probability Recession 0.20 Normal 0.55 Boom 0.25 18 Return (0.17) 0.12 0.29 E(R) = 19 20 Variance = 21 22 Standard Deviation = 23 24 25 Sheet1 ITT n