Recently, a car rental firm charged $36 per day or portion of a day to rent a

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Recently, a car rental firm charged $36 per day or portion of a day to rent a car for a period of 1 to 5 days. Days 6 and 7 were then free, while the charge for days 8 through 12 was again $36 per day. Let A(t) represent the average cost to rent the car for t days, where 0 < t ≤ 12. Find the average cost of a rental for the following number of days.
(a) 4 

(b) 5 

(c) 6 

(d) 7 

(e) 8
(f) Find limx→5- A(t)

(g) Find limx→5+ A(t)

(h) Where is A discontinuous on the given interval?

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