Crazy Joe operates a canoe rental service on the Guadalupe River. He currently leases $15$

canoes from a dealer in a nearby city for $$10$ per day. On weekends, when the water is

high, he picks up the canoes and drives to a launching point on the river, where he rents

canoes to white$-$water enthusiasts for $$30$ per day. Lately, canoeists have complained

about the unavailability of canoes, so Crazy Joe has recorded the demand for canoes and

found the experience below for the past $20$ days:

Daily

Demand Frequency

$101$

$111$

$122$

$132$

$142$

$153$

$163$

$172$

$182$

$191$

$201$

a$.$ Recommend an appropriate number of canoes to lease