Find the error intervals for the following rounded numbers

Question 1:

0.00076 (2 s.f.)

0.000755≤x<0.000765

Question 2:

4.644 (3 d.p.)

4.6435≤x<4.6445

Question 3:

3 (1 s.f.)

2.5≤x<3.5

Question 4:

4.49 (2 d.p.)

4.485≤x<4.495