3. Compose a C++ function named timesSeven. The function should accept an integer (int) argument. When the function is called, it should display the product of the argument multiplied times seven (7).

4. Compose a C++ function named getSpeed that uses a reference parameter variable named speed to accept an integer argument. The function should prompt the user to enter a number in the range of 20 through 70. Set the parameter variable to zero if the user enters a number outside the range of 20 through 70.

5. Given the following prototype statement for a function that determines the minimum value between two given integer values:

int minimum(int a, int b);

compose the prototype statement for an overloaded function that uses the same function name but determines the minimum value between two given double values.