Airport administrators usually price airport parking at a rate that discourages people from using the parking lot for long periods of time. The rate structure for an airport is given in the table below.
Hours Parked  Cost 

0 < t ≤ 1

$1.00 
1 < t ≤ 2

$4.00 
2 < t ≤ 4

$7.00 
4 < t ≤ 7

$9.50 
7 < t ≤ 12

$14.00 
a. The cost when the time t = ...
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