Please Help!

list two functions (different from any that are posted previous to you) and list the first three derivatives of each. Explain how to use the derivatives to get the polynomial approximation for your two functions about x = 4. (so the terms of the polynomial would be (x-4)^n where n are the appropriate powers.

For example, if my function where sin(x), the first three derivatives would be ... and the third polynomial would be ... .