1. Given the following function header, compose the C++ programming statements needed to call the function, passing the value 16.2 as an argument and assigning its return value to a variable named result. double doubleIt (double value) 2. Given the following function header: double harmonic(int a, int b = 10, int c = 25, int d 5) and the following function call: double harmonicMean = harmonic (12, 34); What will be the value of the parameter variable named after the call is executed? 3. Compose a C++ function named timesSeven. The function will accept an integer (int) argument. When the function is called, it will display the product of the argument multiplied times seven (7). 4. Compose a C++ function named validateScore that uses a reference parameter variable named score to accept a reference to an integer (int) argument. The function will set the parameter variable named score to minus one (-1) if the value passed to the parameter variable named score is outside the range of 24 through 42 inclusive. 5. The following statement calls a function named half. The half function returns a value that is one half of the value of the argument passed to the function. Compose two versions of the half function. One that accepts and returns integer values and one that accepts and returns double values: result half(value)