1. If f(z₀) exists, then function f must be continuous at z = z₀.
(a) True   ; (b) False   . 

2. If lim _{z zo} f(z) exists, then function f must be continuous at z = z₀.
(a) True   ; (b) False   .

3. The function f(z) = sin(¹/_z) is continuous everywhere.
(a) True   ; (b) False   .

4. The function f(z) = cos(z³) is continuous everywhere.

(a) True   ; (b) False   .