Use the ke vs. time graph below to answer the following questions. express all answers in the appropriate mks units. ke vs. time graph a.) identify when the object was not moving. b.) over what period of time was the object speeding up? to c.) over what period of time was the object slowing down? to d.) over what period of time was the object maintaining a constant speed? to e.) determine the work done during the following 3 time frames: 0 to 50 s → 50 to 150 s → 150 to 250 s → f.) determine the total work done. g.) determine the power at the following 3 times: 25 s → 60 s → 215 s →