Question: Assume an array arr is declared in the main program. What is the values of the variables ( first , last, and mid ) each

Assume an array arr is declared in the main program. What is the values of the variables
(first, last, and mid) each time calling binarySearch method in order to find the following
keys: (2 marks)
int [] arr ={10,20,30,40,50,60,70,80,90};
a. key =30

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