3) As a coder at a pharmaceutical company,
you've been tasked with writing a program that will determine how long a particular drug may stay on shelves to be sold in
stores. Assume this drug loses 12% of its effectiveness every month (save into a
variable, but you don't have to get this value from the keyboard), and must be
discarded when effectiveness dips below 50%. Write a program that prints how many months the drug can remain on
shelves.
Please leave a comment if you would like a sample run!