Problem $3.$ Mode Function

In statistics, the mode of a set of values is the value that occurs most often or with the greatest frequency.

Write a function that accepts as arguments the following:

a$)$ An array of integers.

b$)$ An integer that indicates the number of elements in the array.

The function should determine the mode of the array. That is$,$ it should determine which value in the array occurs most often.

The mode is the value the function should return.

If the array has no mode $($none of the values occur more than once$),$ the function should return $-1.($Assume the array will always contain nonnegative values.$)$

Demonstrate your pointer process by using pointer notation instead of array notation in this function whenever you can. $($Not mandatory$).$

You can use this algorithm for the function:USE THE NEXT TEMPLATE $($MANDATORY$)$: