If all outcomes are equally likely, find the probability that both stocks rise; that both stocks decline;

Question:

If all outcomes are equally likely, find the probability that both rise; that both decline; that exactly one stock declines.
Base on The following situation: An investor holds two each of which can rise (R), remain unchanged (U), or decline (D) on any particular day.
Stocks
Stocks or shares are generally equity instruments that provide the largest source of raising funds in any public or private listed company's. The instruments are issued on a stock exchange from where a large number of general public who are willing...