Create a function called addressbook that takes as input two dictionaries, name_to_phone and name_to_address, and combines them into a single dictionary address_to_all that contains the phone number of, and the names of all the people who live at, a given address. Specifically, your function should: a. Have input arguments `addressbook(name_to_phone, name_to_address)`, expecting `name_to_phone` as a dictionary mapping a name (string) to a home phone number (integer or string), and `name_to_address` as a dictionary mapping a name to an address (string).
b. Create a new dictionary `address_to_all` where the keys are all the addresses contained in `name_to_address`, and the value `address_to_all[address]` for `address` is of the format `([name1,name2,...], phone)`, with `[name1,name2,...]` being the list of names living at `address` and `phone` being the home phone number for `address`. **Note**: the *value* we want in this new dictionary is a *tuple*, where the first element of the tuple is a *list* of names, and the second element of the tuple is the phone number. (Remember that while a tuple itself is immutable, a list within a tuple can be changed dynamically.)
c. Handle the case where multiple people at the same address have different listed home phone numbers as follows: Keep the first number found, and print warning messages with the names of each person whose number was discarded.
d. Return `address_to_all`.