Tervals. draw the velocity vectors −v⃗ 21 and −v⃗ 43 and the acceleration vectors a⃗ 31 and a⃗ 53 representing the changes in average velocity of the object during the time intervals δt31=t3−t1 and δt53=t5−t3, respectively. assume for this problem that δt31=δt53=1s.