Find the error intervals for the following rounded numbers

Question 1:

0.83 (2 d.p.)

0.825≤x<0.835

Question 2:

4.7 (1 d.p.)

4.65≤x<4.75

Question 3:

1.23 (2 d.p.)

1.225≤x<1.235

Question 4:

1.50 (2 d.p.)

1.495≤x<1.505