write java program

1 Set total to zero Set grade counter to one 2 3 + 5 6 While grade counter is less than or equal to ten Prompt the user to enter the next grade Input the next grade Add the grade into the total Add one to the grade counter 7 8 9 10 Set the class average to the total divided by ten Print the class average Exercises 1. Write the Java program corresponding to the above algorithm. 2. Modify the program to read the data from a file called student dat 3. Extend the program to assign letter grades 4. Extend the program to count how many students will get an A