Astudent's course grade is based on one midterm that counts as 5% of his finalgrade, one class project that counts as 15% of his finalgrade, a set of homework assignments that counts as 30% of his finalgrade, and a final exam that counts as 50% of his final grade. His midterm score is 71, his project score is 98, his homework score is 80, and his final exam score is 75. What is his overall finalscore? What letter grade did he earn(A, B,C, D, orF)? Assume that a mean of 90 or above is anA, a mean of at least 80 but less than 90 is aB, and so on.

His overall final score is