Write a method that computes the value of an arithmetic expression. The operator string should be one of $,$ or $"/").$ The method should throw an IllegalArgumentException otherwise. Also throw an IllegalArgumentException if$.$ the operator is $"/"$ and the second argument is zero.

ArithmeticTester.java

public class Arithmetic

$\{$

$1****$

Computes the value of an arithmetic expression

@param value$1$ the first operand

@param operator a string that should contain an operator $+-**$ or $\frac{?}{?}$

@param value $2$ the second operand

@return the result of the operation

Your code goes here Your code goes here $"))\{$ return $/*$ Your code goes here $*/$; $\}$

else if $($operator$.$equals$("/"))$