Casio FX-82MS 2 - Statistics; Inputting Statistical Data; Statistical Calculations; Calculating Average Mean from Table

Statistics:
Given the data: 10, 7, 10, 9, 8
Input data using calculator
1- Log into SD mode w2
2- input data
10m7m10m9m8m
Calculate:
a- Sample standard Deviation q23=
b- Population Standard Deviation q22=
c- Mean q21=
d- Sum of data q12=
e- Sum of squares q11=
Given table below find average mean
Log into SD mode w2
Grade
9
8
10
7
Frequency
7
3
1
5
1- Fill up data using calculator 82MS
9q,7m8q,3m10q,1m7q,5m
2- Find the average mean: q21=