Some Important formuals in MS Excel

Hello! I need to know some important formulas which can be used in MS Excel when something related to statistics is implemented. What combination of keys (formula) can be used to find
1) The mean of a range of cells?
2) The median of a range of cells?
3) The standard deviation of a range of cells?
4) The mode of a range of cells?
5) The sum of a range of cells?
6) Display the largest value among the range of the cells?
7) Display the smallest value among the range of the cells?
