8. In an interpolated precision-recall graph, if the precision at 40% recall is 0.75 , and at 60% recall is 0.65 , what is the interpolated precision at 50% recall? A. 0.65 B. 0.70 C. 0.75 D. 0.80 E. 0.60 9. If the first relevant document in a search appears at the 4 th position, what is the Mean Reciprocal Rank (MRR) - 0.25 - 0.50 - 0.75 - 1.00 - 1.25 10. If Precision is 0.8 and Recall is 0.6 , what is the F-Measure using a balance factor of 1 (equal weight to precision and recall)? - 0.68 - 0.70 - 0.75 - 0.80 - 0.85