Explain the main work$/$function of the following program. $[5$ Marks$]$ import java.util.Scanner; class Main $\{$ public static void main$($String$[]$ args$)\{$ char operator; Double number$1,$ number$2,$ result; $//$ create an object of Scanner class Scanner scanner $=$ new Scanner$($System$.$in$)$; System.out.print$("$Enter operator $($either $+,-,*$ or $/)$: $")$; $//$ ask user to enter operator operator $=$ scanner.next$().$charAt$(0)$; System.out.print$("$Enter number$1$ and number$2$ respectively: $")$; $//$ ask user to enter numbers number$1=$ scanner.nextDouble$()$; number$2=$ scanner.nextDouble$()$; switch $($operator$)\{//$ performs addition between numbers case $\text{'}+\text{'}$: result $=$ number$1+$ number$2$; System.out.print$($number$1+"+"+$ number$2+"="+$ result$)$; break; $//$ performs subtraction between numbers case $\text{'}-\text{'}$: result $=$ number$1-$ number$2$; System.out.print$($number$1+"-"+$ number$2+"="+$ result$)$; break; $//$ performs multiplication between numbers case $\text{'}*\text{'}$: result $=$ number$1*$ number$2$; System.out.print$($number$1+"*"+$ number$2+"="+$ result$)$; break; $//$ performs division between numbers case $\text{'}/\text{'}$: result $=$ number$1/$ number$2$; System.out.print$($number$1+"/"+$ number$2+"="+$ result$)$; break; default: System.out.println$("$Invalid operator!"$)$; break; $\}\}\}2.$ Find out the output of the following code. $[5$ Marks$]$class Main $\{$ public static void main$($String$[]$ args$)\{$ int $[]$ numbers $=\{1,2,3,4,5,6\}$; int $[]$ positiveNumbers $=$ numbers; $//$ copying arrays for $($int number: positiveNumbers$)\{$ System.out.print$($number $+",")$; $\}\}\}$