The following is a list of 5 measurements.5, 17, 10, 13, 19Send data to calculatorSuppose that these 5 measurements are respectively labeled X2, X2, ..., Xs. Compute the following.5Σ (4)i=1

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)