Write a Java program, GradeApp that reads a series of exam scores given as integers in the range 0 to 100. Display the total number of grades and the number of grades in each letter-grade category,...

Write a Java program,
GradeApp that reads a series of exam scores given asintegers in the range 0 to 100.  Display the
totalnumber of grades and the number of grades in each letter-grade category, followed class average (as a percentage with 2 decimal place):

Use the value -1 as a sentinel value to indicate the end of the input.  (The -1 value is used only to end the loop.  Please do not use it in the calculations.)