You bought BFC stocks at the end of Year 1 and hold BFC stocks with the following prices at the end of Year 2, Year 3, and sold them at the end of Year 4: Year Stock BFC 1 $100 2 $110 3 $90 4 $80 Compute both arithmetic and geometric average returns on a per annum basis over the holding period. Which is the preferred method of measuring average return? Explain why.