Find the error intervals for the following truncated numbers

Question 1:

100000 (1 s.f.)
100000≤x<200000

Question 2:

3.588 (3 d.p.)
3.588≤x<3.589

Question 3:

500 (1 s.f.)
500≤x<600

Question 4:

0.585 (3 s.f.)
0.585≤x<0.586