Sort the following errors as either systematic, random, or both.

Assuming that this is the full question :

1. A 50.0-mL transfer pipet always delivers 50.045±0.004 mL. 

2. A 50.0-mL buret delivers 1.94±0.01 mL when drained from exactly 1 to 3 mL, and delivers 2.02±0.01 when drained from exactly 3 to 5 mL. 

3. A 5.0-mL buret when drained from 0 to 2 mL delivered 2.03 mL. The next time when drained from 0 to 2 mL delivered 1.98 mL. 

4. The percent transmittanced of the same solution is measured as 66.5%, 66.3%, 66.2%, and 66.5%.

statement no 1 and 2 are both systematic and random while statement 3 and 4 are random.

What was the length to begin with?