Design a spreadsheet to maintain a grade sheet for a set of 20 students. Include three tests, a final exam, and a project, given the weights of 15% for the tests, 35% for the final exam, and 20% for the project in the calculation of the final grade for each student. Compute the average grade per test, final exam, and project for the whole class. Note: the grades should be realistic in being comparable to what you would expect in an actual class.