please help. with. this c++ problem

thank you

1. a. Write the function to Swap two numbers, but now you have to use the pass by reference method b. Now you need to have a function to read in the values, but you will pass by reference now. The function name can be readint c. You will do the swapping also using pass by reference method. Use the function name as Swap Print out the values after swapping inside the function Print out the values inside the main also. What do you see and how d. e. do you explain this result