8. On the COUNTIF sheet, in M2:M5, use the COUNTIF( ) function to calculate the number of students in each of the four grades (9th, 10th, 11th, and 12th). The grade for each student is in column I. Then sum the number of students in M6. The value in M6 should be 97. NOTE: For this and the next five problems, do not use the entire column address inside the COUNTIF( ) function as in =COUNTIF(I:I,L2). Although it often works, it will cause problems if there is data further down the sheet.

9. On the COUNTIF sheet, use the COUNTIF( ) function to calculate the number of female and male students in M10:M11. The gender of each student is in column B. Then sum the number of students in M12. The value in M12 should be 97.