How do T1 and T2 compare in terms of consistency? Select one: D a. Both T1 and T2 are consistent for 9. O b. Both T1 and T2 are inconsistent for 9. D c. T1 is consistent and T2 is inconsistent. 0 d. T1 is inconsistent and T2 is consistent. How do 71 and 72 compare in terms of relative efficiency? Select one: O a. T, is a more efficient estimator of 0 than To . O b. To is a more efficient estimator of 0 than Ti.Let X1 , . . . , X be a random sample from N(0, l9). In an attempt to estimate :9, we consider the following estimators: 1 T 1 nl im- X)? and T2 : iixa i=1