Consider the following function: double mystery(int x, double y, char ch){if (x > 0 && isupper(ch))return(sqrt(x * 1.0) + (static_cast<int>(ch) - 65));elsereturn(pow(y,3) + x + static_cast<int>(ch));}What is the output of the following C++ statements? (Assume that the output of decimal numbers is set to two decimal places.)a. cout << mystery(16, 2.0, 'A') << endl;b. cout << mystery(5, 3.0, '*') << endl;c. cout << mystery(-7, 2.5, 'T') << endl;

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Declaring and Defining the function

A set of statements, which performs a particular task is called a function. The program gains modularity by using function. The application is quite easy to understand, read, and edit when they are created with functions. The developer/programmer creates a function and uses main() to call the function. Once the function gets executed, the control is transferred to the main program.