Find the error intervals for the following truncated numbers

Question 1:

1.73 (2 d.p.)
1.73≤x<1.74

Question 2:

0.00086 (2 s.f.)
0.00086≤x<0.00087

Question 3:

6 (1 s.f.)
6≤x<7

Question 4:

4.93 (2 d.p.)
4.93≤x<4.94