Find the error intervals for the following rounded numbers

Question 1:

0.0004 (1 s.f.)

0.00035≤x<0.00045

Question 2:

0.80 (2 d.p.)

0.795≤x<0.805

Question 3:

0.006 (1 s.f.)

0.0055≤x<0.0065

Question 4:

5.5 (1 d.p.)

5.45≤x<5.55