Find the midpoint between the complex numbers. z1 = 5 - 2i z2 = 8 + i (-1.5, -5) (6.5, 1.5) (6.5, -0.5) (13,-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%)