Winter 2017: Some sections will be using the A version (click here) of the Biceps lab [1].
Other sections will use the B version (click here) [2].
Ask your TA which version you will be using.
Links:
[1] https://demoweb.physics.ucla.edu/sites/default/files/Physics6A_Exp6_a.pdf
[2] https://demoweb.physics.ucla.edu/sites/default/files/Physics6A_Exp6_b.pdf