i need help on this code

/* Convert from Celsuis to Fahrenheit */

public static double celsiusToFahrenheit(double celsius)

and

/* Convert from Fahrenheit to Celsius */

public static double fahrenheitToCelsius(double fahrenheit)

The formulas are as follows:

fahrenheit = (9.0 / 5) * celsius + 32

celsius = (5.0 / 9.0) * (fahrenheit - 32)

Write a program to invoke these methods and display in a neat table format the following ranges of conversions:

Fahre to celsius from 30 degrees F to 120 degrees F in increments of 10

celsius to Fahr from 31 degrees C to 40 degrees C in increments of 1