Consider the Following Definition of the Recursive Function Mystery $\quad$ Return 0;
Else If (First == Last)

question 11

Multiple Choice

Consider the following definition of the recursive function mystery. int mystery(int first,int last)
{
if (first > last)
$\quad$ Return 0;
else if (first == last)
$\quad$ Return first;
else
$\quad$ return first + mystery(first + 1,last - 1) ;
}
What is the output of the following statement?
cout << mystery(6,10) << endl;

• A) 13
• B) 21
• C) 40
• D) 42

---

Definitions:

Education

Education encompasses the process of teaching, learning, and training individuals to develop knowledge, skills, values, and beliefs.

Least Squares Regression

A statistical method used to find the best-fitting line through a set of points by minimizing the sum of the squares of the vertical distances of the points from the line.

Calories

Calories are units of energy used to quantify the amount of energy stored in food and how much energy is utilized by the body.

Sugar

A sweet-tasting, soluble carbohydrate found in many plants, which is commonly used as a sweetener in food.