Find the error intervals for the following truncated numbers

Question 1:

0.7 (1 d.p.)
0.7≤x<0.8

Question 2:

1.319 (3 d.p.)
1.319≤x<1.320

Question 3:

83 (2 s.f.)
83≤x<84

Question 4:

0.034 (2 s.f.)
0.034≤x<0.035