Example Click to add 1 Ser totalto zero Set grade counter to one 2 3 + D R 5 6 While grade counter is less than or equal to ten Prompt the user to enter the next grade Inpur the next grade Add the grade into the total Add one to the grade counter 7 8 9 10 11 Set the class average to the total divided by fen 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.dor 3. Extend the program to assign letter grades 4. Extend the program to count how many students will get on A CII, VALU