please help

You have been hired by the Westinghouse International division to help with a problem they have with their ovens.

Because they need a program that will either convert Fahrenheit to Celsius or Celsius to Fahrenheit, depending on the letter inputted and then the temperature to convert.

That they want to add 2 new conversions to this program. Now they also want to be able to convert miles to kilometers or kilometers to miles.

Your program should be able to convert one of 4 conversions depending on the input.

Must use switch instead of if else/if else.

Must also ask to run again.