7. [-/4 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE A A particle moves along a curve so that its velocity (in meters per second) is given by v(t) = t2 +7 t -30 (a) Find the displacement over the time interval 0 ,4 .. m (b) Find the distance over the time interval 0 ,4 . . m (c) Find the average speed over the time interval 0 ,4 . . m/s (d) Find the avrage velocity over the time interval 0 ,4 .. m/s + Show My Work (Optional)