State whether the errors in (a) - (d) are random or systematic:
(a) A 25-mL transfer pipet consistently delivers 25.031 ± 0.009 mL.
(b) A 10 - mL buret consistently delivers 1.98 ± 0.01 mL when drained from exactly 0 to exactly 2 mL and consistently delivers 2.03 mL ± 0.02 mL when drained from 2 to 4 mL.
(c) A 10-mL buret delivered 1.9839 g of water when drained from exactly 0.00 to 2.00 mL. The next time I delivered water from the 0.00 to the 2.00 mL mark, the delivered mass was 1.990 0 g.