1. To test whether different professors were harder or easier graders, a group of students submitted the same report to four different profs and recorded the mark given to each essay by each professor. The IV is professor, the DV is grade (as a percentage of 100). In the table below, has the assumption of sphericity been met? Please report your findings in a sentence format. Mauchly's Test of Sphericity Measure: Measure I Within Mauchly's Approx. df Sig. Greenhouse- Huynh- Lower- Subjects W Chi-Square Geisser Feldt bound Effect Tutor 131 11.628 5 043 558 .712 1333 2. How did we arrive at the Lower-bound estimate of .333 in the table above? Please provide any necessary formula