Exercise 4: Write a C++ program (using switch statement) that reads a number followed by one space and then a letter. If the letter following the number is F or f, the program should treat the entered number as a temperature in Fahrenheit, convert the number to the equivalent Celsius temperature and print a suitable display message. If the letter following the number is C or c the program should perform the opposite conversion (from Celsius to Fahrenheit). If the letter is neither fnor c the program should print a message that the data entered is incorrect and terminate. Use the following formulas forrng bet Fabrenheit and Celsius Celsius = * (f-32) 9 Fahrenheit =-* c + 32