9. Let us say, given the samples Xi = {xti

, rt i

}, we define gi(x) = r 1 i , namely, our estimate for any x is the r value of the first instance in the (unordered) dataset Xi . What can you say about its bias and variance, as compared with gi(x) = 2 and gi(x) =



t r t i /N? What if the sample is ordered, so that gi(x) = mint r t i ?