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For questions 2 through 4 assume the following definitions for a one-way linked list that has a header block of type List and list elements of type ListNode. 4. (15 points) Write a recursive program that returns the number of positive NodeItem values in the first count elements in a linked list. No credit will be given for an iterative solution, or a solution that uses global or static variables. You must use the following prototype for CountPositive. Additional functions are permitted, but none of the functions are permitted to use any type of iteration. (If count is zero, return zero. The number zero is neither postive or negative.)