We've created a database to track student grades, with their name, number grade, and what percent of activities they've completed. In this first step, select all of the rows, and display the name, number$\_$grade, and percent$\_$completed, which you can compute by multiplying and rounding the fraction$\_$completed column. Now, this step is a little tricky. The goal is a table that shows how many students have earned which letter$\_$grade. You can output the letter$\_$grade$$by using CASE$$with the number$\_$grade$$column$,$ outputting $\text{'}$A$\text{'}$ for grades $>90,\text{'}$B$\text{'}$ for grades $>80,\text{'}$C$\text{'}$ for grades $>70,$ and $\text{'}$F$\text{'}$ otherwise. Then you can use COUNT$$with GROUP BY$$to show the number of students with each of those grades.