$$Using Visual Studio:

$2.$ Grade Book: A teacher maintains a database containing two tables$-$Students and Grades. The Students table has three fields: studentID, lastName, and firstName. The Grades table has four fields: studentID, firstExam, secondExam$,$ and finalExam. At the beginning of the semester, the Students table is filled in completely with a record for each student in a class, and the Grades table has a record for each student that contains only the student's ID number. $($Note: The database is contained in the file Gradebook. accedp. from the folder Ch$10\backslash$Databases$.)$ Write a program that allows the instructor to record and process the grades for the semester. The program should do the following:

$($a$)$ Use a navigation toolbar to fill the Grades table.

$($b$)$ After all grades have been entered, display a DataGridView control showing the name of each student and his or her semester average. The semester average should be calculated as $($firstExam $+$ secondExam $+2$ # finalExam$)/4.$ See Fig. $10\mathrm{.}59.$

FIGURE $10\mathrm{.}59$ Possible outcome of Programming Project $2.$