Titration lab calculations help please?

Ok so im super confused on how to do these calculations. we need to do something called error propagation. I understand somewhat how to do the calcuations without the error but with the error im confused.

Trial 1 - initial volume = 11.41mL, final volume = 21.41mL, total volume = 10mL
Trial 2- initial volume = 21.41mL, final volume = 31.31mL, total volume = 9.9mL
Trial 3- initial volume = 31.31mL, final volume = 41.31mL, total volume = 10mL

Burette error +/- 0.005mL
Pipette error +/- 0.004 mL  

NaOH = 0.500M +/- 0.005mL
Sulfuric Acid = ?
NaOH was added to H2SO4..
Starting amount of H2O was 11.41mL..
Oops.. Amount of H2SO4 was 10mL..