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$-$life of about $6$ hours in humans. Given caffeine amount $($in mg$)$ as input, output the caffeine level after $6,12,$ and $24$ hours. Use a string formatting expression with conversion specifiers to output the caffeine amount as floating$-$point numbers.Output each floating$-$point value with two digits after the decimal point, which can be achieved as follows: