Use z-scores to determine who had a more disappointing quiz mark and explain fully: Susan had a mark of 8.7 on a quiz for which the mean mark was 10.1 and the standard deviation was 1.8 whereas Wally had mark of 9.5 on a quiz for which the mean was 9.9 and the standard deviation was 1.4. Show all work by typing here or inserting a photo of your