Measurement Accuracy and precision lab and there was few

im doing “Measurement Accuracy and precision lab and there was few question i couldn’t find the answer.1. what is the advantage of using the graduated cylinder rather than a pipetter or a burette for measurement of approximste volumes?2. why is the burette more versatile than a pipette for measuring volumes of liquids?5. why is an average of several trials taken in each case rather than the results of a sungle trial?6. even if the volume of the water could be meausured very accurately there would still be uncertainly in the mass of the water. what is source of error have we not take account?what is the error will happen in this lab?you guys better help me becuase i payed 112