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functions

Using the new get_price() function, write a new version of the
price-checking program that does this:
1. Ask the user to indicate if the price is required immediately (Y/N).
2. If the user chooses “Y” for “yes,” find the current price and display it
on the screen.
3. Otherwise, check the price every 15 minutes until it falls below
$4.74, then (and only then), display the price on screen.

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