Use the VELOCITY vs. TIME graph below to answer the following questions. Let west be the positive direction & east be the negative direction. Express all answers in the appropriate mks units. [NOTE: m/s should be entered as m/s^2.] x-velocity (m/s) 100 50 0 -50 VELOCITY vs. TIME GRAPH -100 5 10 15 20 25 t (s) A.) Over what period of time was the object speeding up? 20 s to 25 s B.) Over what period of time was the object slowing down? Os to 15 s C.) Over what period of time was the object's velocity constant? 15 s to 20 s D.) State the magnitude & direction of the object's acceleration at 8.5 s. 50 m/s^2 X east E.) State the magnitude & direction of the object's acceleration at 18 s. Choose direction --- F.) State the magnitude & direction of the object's acceleration at 22 s. Choose direction --- V