At which points do the functions in Exercises 11 and 12 fail to be continuous? At which...

At which points do the functions in Exercises 11 and 12 fail to be continuous? At which points, if any, are the discontinuities removable? Not removable? Give reasons for your answers.

Exercise 2, Section 2.4

2. Which of the following statements about the function y = f(x) graphed here are true, and which are false?