Find the error intervals for the following rounded numbers

Question 1:

2.20 (2 d.p.)

2.195≤x<2.205

Question 2:

87000 (2 s.f.)

86500≤x<87500

Question 3:

2.7 (1 d.p.)

2.65≤x<2.75

Question 4:

0.0271 (3 s.f.)

0.02705≤x<0.02715