A professor grades students on three tests, four quizzes, and a final examination. Each test counts as two quizzes and the final examination counts as two tests. Sara has test scores of 74, 80, and 83. Sara's quiz scores are 88, 77, 79, and 89. Her final examination score is 74. Use the weighted mean formula to find Sara's average for the course. (Round your answer to one decimal place.)