Title: Array reference and memory allocation

Problem description: Given the following code snippet:

java

int$[]$ arr $=$ new int$[4]$;

arr$[0]=200$;

arr$[1]=868$;

$\backslash$operatorname $\{$ a r r $[2]$ ~ $=$ ~ $55$ ; $\}$

arr$[3]=333$;

int$[]$ arr$2=$ arr;

arr$2[1]=999$;

arr$2=$ new int$[3]$;

arr$2[$e$]=123$;

arr$2[1]=456$;

arr$2[2]=789$;

Questions:

Please draw the memory structure diagram after arr$2=$ arr; and explain the relationship

between arr$2$ and arr.

After executing arr$2[1]=999,$ what changes will occur to the contents of the arr array?

Why?

When executing arr$2=$ new int $[3],$ explain the changes in arr$2$ and arr in memory and

draw the new memory structure diagram.

After the code is executed, what are the contents of the arrays pointed to by arr and

arr$2.$respectively?