Answer below questions. For questions b and c, you only need to give out the function header (20 points, 5 points each). 4. a. What is the difference between pass by value and pass by reference Give out the header of a function named getNumber which takes a float variable seed as the pass by value parameter, an integer variable round as pass by reference input, and a boolean variable exist as pass by reference input. The return type is void b. Give out the header of a function named findStar which takes two floats named x and y as pass by value parameters. The function returns false if a star cannot be found in the given position and true otherwise. c. Suppose we have a function defined to calculate the area of a rectangle, as shown below double calRecArea (double width, double height) d. return width height Please give out the code that calls the function to calculate the area of a rectangle whose width is 3.5 and height is 4.4. You also need to output the final area to the console