The program first reads integer lectureCount from input, representing the number of pairs of inputs to be read. Each pair has a string and an integer, representing the lecture's topic and duration, respectively. One Lecture object is created for each pair and added to ArrayList lectureList. Write the findAverageLectureDuration$()$ method in the Inventory class to return the average duration of all the Lecture objects as an integer.

Ex: If the input is:

$3$

Music $97$ Fashion $85$ Culture $130$

then the output is:

Average lecture duration: $104$

Note: The ArrayList has at least one element. Inventory.java: import java.util.Scanner;

import java.util.ArrayList;

public class Inventory $\{$

private ArrayList lectureList $=$ new ArrayList$()$;

public void inputLectures$($Scanner scnr$)\{$

Lecture currLecture;

String currTopic;

int currDuration;

int lectureCount;

int i;

lectureCount $=$ scnr$.$nextInt$()$;

for $($i $=0$; i $<$ lectureCount; $++$i$)\{$

currTopic $=$ scnr$.$next$()$;

currDuration $=$ scnr$.$nextInt$()$;

currLecture $=$ new Lecture$()$;

currLecture.setTopicAndDuration$($currTopic$,$ currDuration$)$;

lectureList.add$($currLecture$)$;

$\}$

$\}$

$/*$ Your code goes here $*/$

$\}$ Lecture.java: public class Lecture $\{$

private String topic;

private int duration;

public void setTopicAndDuration$($String newTopic, int newDuration$)\{$

topic $=$ newTopic;

duration $=$ newDuration;

$\}$

public int getDuration$()\{$

return duration;

$\}$

$\}$ LectureSystem.java: import java.util.Scanner;

import java.util.ArrayList;

public class LectureSystem $\{$

public static void main$($String$[]$ args$)\{$

Scanner scnr $=$ new Scanner$($System$.$in$)$;

Inventory inventory $=$ new Inventory$()$;

inventory.inputLectures$($scnr$)$;

System.out.println$("$Average lecture duration: $"+$ inventory.findAverageLectureDuration$())$;

$\}$

$\}$