The total number of words M t that a person can memorize in t minutes is shown in the graph below Complete parts a and b to the right 40 AM 30 20 10 0 24 26 16 22 8 10 32 26 8 16 24 36 26 323640 Note Graph not drawn to scale t Q 5 a Find the average rate of change of M as t changes from 0 to 8 from 8 to 16 from 16 to 24 from 24 to 32 from 32 to 36 The average rate of change of M as t changes from 0 to 8 is Simplify your answer The average rate of change of M as t changes from 8 to 16 is words min Simplify your answer The average rate of change of M as t changes from 16 to 24 is Simplify your answer words min The average rate of change of M as t changes from 24 to 32 is Simplify your answer words min words min words min The average rate of change of M as t changes from 32 to 36 is Simplify your answer b Explain the behavior of the average rates of change after 24 min OA The graph becomes horizontal and therefore has an undefined slope OB The graph becomes vertical and therefore has no slope OC The graph becomes horizontal and therefore has a slope of zero OD The graph becomes vertical and therefore has an undefined slope