Upper and Lower Bounds

Question 1:

Find the upper bound of 10.5 rounded to 1 d.p.

10.55

Question 2:

Find the lower bound of 0.987 rounded to 3 d.p.

0.9865

Question 3:

Find the lower bound of 76.77 rounded to 2 d.p.

76.765

Question 4:

Find the upper bound of 12 rounded to 2 s.f.

12.5