3. When estimating a Sharpe ratio, would it make sense to use the average excess real return that accounts for inflation? ( LO 5-4) 4. You've just decided upon your capital allocation for the next year, when you realize that you've underestimated both the expected return and the standard deviation of your risky portfolio by a multiple of 1.05 . Will you increase, decrease, or leave unchanged your allocation to risk-free T-bills? ( LO 5-4)