Please solve the following problems. Write neatly please ans thank you!

Question / ( 2 points) If a student uses an uncalibrated Class A.20-mL pipet to deliver a total of 60mL solution, what is the uncertainty in the delivered 60mL ? The tolerance of a Class A 20mL transfer pipet is 0.03mL. 0.1mL0.05mL0.003mL0.09mL None of those 0.03mL Question 8 ( 2 points) The operations involved in preparing a diluted solution from a more concentrated solution are shown. What is the absolute uncertainty in the concentration of the diluted solution? 100.00(0.08)mL0.363(0.004)M15.00(0.03)mL=0.05445M(unrounded) 0.09M0.00001M0.0006M0.004M None of those 0.01M Question 9 ( 2 points) When dispensing 20mL using a 10mL Class A pipet lwith a calibrated volume of (10.00+1+0.02)mL. what is the total volume dispensed and what is the uncertainty in this volume? Report the answer as X.YZmL+fab.mL. (Example: 15.00mL+/0.01mL - Note the space before and after +/sign and before mL ) A. Complete the calculation using the manufacturer's tolerance of 10.00mL0.02 mL