Write a main application called Project1.java, and a GUI (that extends JFrame) called RomanNumeralGUI.java. The main program should open a file called input.txt which will contain Roman numerals. There may be more than one Roman numeral on a line, and they will be separated by commas.

The GUI should have a grid layout of one row and two columns (column 0 and 1). Column 0 should contain each individual Roman numeral from the file. Column 1 should have corresponding lines that give the Arabic value of the Roman numeral. For example, if the input file contains

IX

MMXXIII,VII

Then the content pane of the GUI should contain

IX 9

MMXXIII 2023

VII 7

The core of this project is the conversion of a Roman numeral to an Arabic numeral. It is suggested you write this method first and test it. Lets call it valueOf which, when given a String representing a Roman numeral will return an int for its integer Arabic value. That is, valueOf(VII) returns 7.

(Please assist without using hashmaps and explain the steps in a beginner friendly way.)