7) Use the given acceleration function to find the velocity and position vectors. Then find the position at time t= 2 seconds. a(t) = i + j + k v(0) = 0 ; r(0) = 0 Solution velocity at 2 sec= v(2)= 2i + 2j + 2k position after 2 sec= r(2)= 4i + 4j + 4k.