3.	The position of an object is observed for 10 seconds and summarized in the following table and the x-t graph: 
                                                                           

(s)

x (m)

0

-0.4320

1

+1.4560

2

+2.0000

3

+1.5840

4

+0.5920

5

-0.5920

6

-1.5840

6.01

-1.5917

6.02

-1.5992

7

-2.0000

8

-2.0000

9

-2.0000

10

-2.0000

	
	a.	( 5 points)
		What is the average velocity of the object in this 10 second period?










	
	b.	( 5 points)
		Calculate the velocity at t=6s to the highest possible accuracy.












	c.	(10 points)
		Calculate the acceleration at t=6s to the highest possible accuracy.



























	d.	( 5 points)
		At what times the object has zero velocity?