Computer Programming (2) - Exercises 1-Using CH predefined functions, write each of the following as C++ expression 1-b+ V2b+45 C + 2b 2.b + x + 2 3. b = x + ant 4- X= -b+b7-400 2ab 2-Write the definition of a void function called Threetimesfun that takes as input an integer number and output 3 times the value of the integer number 3-Write the definition of a void function called initialize with two reference parameters of type int and double. The function sets the values of the int and double variables to 0. Computer Programming (2) -Exercises 4-Write the definition of function called PrintNaturallNumbers with two parameters (start and end) of type int. The function prints all the numbers from start to end. 5. Write a program that prompts the user to enter two numbers (nl and n2) then swap them. Your program must have the following function: a. Swap: This function takes the reference parameters of nl and n2 and swap their values Sample run: Enter two numbers nl and n2: 10 20 In Main function values before swapping: 10 20 In Swap Function values before swapping: 10 20 In Swap Function values after swapping: 20 10 In Main function values after swapping: 2010