Limits and continuity Which of the following statements are true, and which are False? I...

Limits and continuity Which of the following statements are true, and which are False? If true, say why; if false, give a counter example (that is, an example confirming the falsehood).

a. If does not exist.

b. If neither does not exist.

c. If f is continuous at, then so is |f|.

d. If |f| is continuous at a, then so is f.