What are stock dividends and stock splits? How do stock dividends and splits affect stock prices?

Stock dividends

What are stock dividends and stock splits?
How do stock dividends and splits affect stock prices?
In what situation should a firm pay a stock dividend?
In what situation should a firm split its stock?
Suppose you have 100 common shares of Tillman Industries. The
EPS is $4.00, the DPS is $2.00, and the stock sells for $60 per share.
Now Tillman announces a two-for-one split. Immediately after the
split, how many shares will you have, what will the adjusted EPS
and DPS be, and what would you expect the stock price to be?