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01 package uk.ac.ed.ph.advcompsim.part3.closure;24 public interface Closure {25     26     /**27      * <code>function</code> is a real-valued function of a real variable.28      * 29      * @param x The argument for the function30      * @return The value of <code>function(x)</code> of the function31      *    <code>function</code> applied to the argument <code>x</code>.32      */33     float function(float x);34 }This bit I understand, which means in my class I need to define "function()" - thus...import java.io.*;import java.math.*;import uk.ac.ed.ph.advcompsim.part3.closure.*;public class exc318 implements Closure {	public static void main (String args[]) {		Closed datasample2;							// The data array	}	public float function(float x) {		float f = (float) (Math.pow((double) x, (double)-1/4));			// Math.pow - for the programming language that lost the ^ :(		return f;	}}