#### Answer

a) Limit does not exist.
b) Limit exists (1).
c) Limit exists (0).
d) Limit exists (0.5).

#### Work Step by Step

a) Limit does not exist. Function g(x) is not approaching a single value as x approaches to 1.
b) Limit exists. Function g(x) approaches to 1 as x approaches to 2.
c) Limit exists. Function g(x) approaches to 0 as x approaches to 3.
d) Limit exists. Function g(x) approaches to 0.5 as x approaches to 2.5.