How can you start a conversation with a friend?

I'm taking a class on how to make a movie, and it offers some apps that would be in the process. the thing is, i don't have any of those ha. if you have any tips on some apps i could use, that would be awesome. i don't have an iphone, so don't suggest any apps like imovie. i know that this is a weird question, but it would be super for me. : )

Explain how email technologies enable the exchange of messages between users. find out the typical parts of an email address and explain each part.

If you combine two cells into one, what action are you performing? a.  adding a new row or column      b.  splitting the cells      c.  removing a new row or column      d.  merging the cells