Problem
1. Write a function to convert Celsius to Fahrenheit.
2. Write a function to convert Farenheit to Celsius.
3. If you have both of the last two functions (Celsius to Farenheit, and Farenheit to Celsius), are the exact inverses of one another? If you convert 32 degree Farenheit to Celsius, and then back to Farenheit, do you get 32 again? Try out different values. When does it work, and when doesn't it-and why?