Please i need help on my Java. I use jgrasp since its easier to use that but i dont know how to make a code on this one.

4. a. Write a Java class that declares a named constant to hold the number of quarts in a gallon (4). Also declare a variable to represent the number of quarts needed for a painting job, and assign an appropriate value-for example, 18. Compute and display the number of gallons and quarts needed for the job. Display explanatory text with the values-for example, A job that needs 18 quarts requires 4 gallons plus 2 quarts. Save the class as QuartsToGallons.java. b. Convert the QuartsToGallons class to an interactive application. Instead of assigning a value to the number of quarts, accept the value from the user as input. Save the revised class as QuartsToGallonsInteractive.java