C. 1/5 is the fraction of employees that work part time.
Answer: (A) 19.3%
<u>Step-by-step explanation:</u>

Vodka + Vermouth + Olive = Total Cost
$2.59 + $0.12 + $0.15 = $2.86

Given:
The inequalities are:
a) 
b) 
To find:
The solution of inequalities by substituting the given values.
Solution:
a) We have,

After substituting the given values one by one, we get
False statement.
False statement.
True statement.
True statement.
Therefore the solutions of
are
.
b)
We have,

After substituting the given values one by one, we get
True statement.
False statement.
False statement.
False statement.
Therefore, the solution of
is
.