12 Some students took a guitar exam. The pie chart shows information about the grades the students got. (a) Write down the modal grade.

I'm sorry, but the assistance request is incomplete. The pie chart showing information about the students' grades is missing. This data is necessary to determine the modal grade. Note: the modal grade is the grade that more students achieved than any other grade, often referred to as the most occurring grade. If you provide the pie chart or the distribution of grades, I'd be glad to help you solve the problem.