Write a program that grades three exams for a class. Your program will read in lines of data that contain the following items: 1. Student ID (an integer) 2. Student name, with the first and last name separated by an underscore, as John_Cole. Store this as a string, not as an array of char. 3. Grades on three tests. These are integers.

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.