Implement the following integer methods: a) Method celsius returns the Celsius equivalent of a Fahrenheit temperature, using the calculation celsius = 5.0/9.0 * (fahrenheit-32): b) Method fahrenheit returns the Fahrenheit equivalent of a Celsius temperature, using the calculation fahrenheit = 9.0/5.0 * celsius + 32: c) Use the methods from parts (a) and (b) to write an application that enables the user either to enter a Fahrenheit temperature and display the Celsius equivalent or to enter a Celsius temperature and display the Fahrenheit equivalent