A half-life is the amount of time it takes for a substance or entity to fall to half its original value. Caffeine has a half-lif
e of about 6 hours in humans. Given caffeine amount (in mg) as input, output the caffeine level after 6, 12, and 18 hours. Ex: If the input is 100, the output is: After 6 hours: 50.0 mg After 12 hours: 25.0 mg After 18 hours: 12.5 mg
