Find the error intervals for the following truncated numbers

Question 1:

4.8 (1 d.p.)
4.8≤x<4.9

Question 2:

3.02 (2 d.p.)
3.02≤x<3.03

Question 3:

3.1 (1 d.p.)
3.1≤x<3.2

Question 4:

3.5 (1 d.p.)
3.5≤x<3.6