Kindly help me with my practice exercises in statistics.

It says here that the final answers should be in terms of the computedexact valueswith theexceptionof the mean (round off to 1 decimal place) andvariance &standard deviation(round off to 2 decimal places).

Given a sample: 15.8,17.2,19.1,15.8,13.0,20.8,14.7,20.8

Compute:

1) the mean

2) the median

3) the mode

4) the variance

5) the standard deviation

6)P₆₃

7)D₄

8)Q₃