Hint: Look at the UML diagram if you are confused. Step 7: Within the Controller class in the main() under the code you wrote in step 6, write the code that creates five phone instances with random numbers and prices and add them to the bookBag's items's. Note you must use a for loop here. Hint: You rndGen three time to generate the number String phoneNumber = + areaCode + threeDigit fourDigit; Step 8: Within the BookBag class write the code for the displayitems(). Only write the needed code for Phone type for now. The code will call the displayinfo() of a Phone instance. Hint: for (Object item: items) { if (item instanceof