Finding Velocity & Error Analysis from Position vs Time Data

[eg24041]

Homework Statement

I have a physics lab due and need help finding a velocity vs time graph from a position vs time graph. I also need help finding the Mathematical error analysis from the data. here is the data for the position vs time graph

time(sec) position (cm)
0.0000 0
0.4084 10
0.6076 20
0.7420 30
0.8740 40
0.9890 50
1.0731 60
1.1791 70
1.2829 80
1.3671 90
1.4289 100
1.5152 110
1.5969 120

 

[malawi_glenn]

what have you tried so far?