The height of an object launched upward from ground level is given by the function s(t) = -4.9t2 + 78.4t, where s(t) is the height in meters and t is the time in seconds. Arrange the time intervals in ascending order of the object's magnitude of average velocity over the interval. Options:
8 seconds to 11 seconds
6.5 seconds to 8 seconds
2 seconds to 2.5 seconds
4 seconds to 4.5 seconds
3 seconds to 3.5 seconds
9 seconds to 11 seconds
9.5 seconds to 10 seconds