#### Answer

The set of students are = {Ann, Al, Gavin, Amy, Ron, Grace}

#### Work Step by Step

From, The given Venn diagram,
the set of students who scored 90% or above in Exam 2 represents the region II, III, V, VI.
The set of students who scored 90% or above in Exam 1 and Exam 3 represents the region I, II, III, VI, VII, VIII.
The set of students who scored 90% or above in Exam 2 and not on Exam 1 and Exam 3 represents the region II, III, VI.
The set of students are = {Ann, Al, Gavin, Amy, Ron, Grace}.