can somebody please answer this question for me? (typed out preferably)

2.1 Continuity, differentiability review - Give an example of a function f:RR that is continuous everywhere on its domain but has at least one point at which it is not differentiable. - Give an example of a function f:RR that is not continuous at 0 . Hint for both of these: You can define piecewise functions (i.e., you can think of a function that has some form on one interval and then a different form on another interval). The purpose of this problem is for you to recall intuitively/graphically what continuity and differentiability mean