Jepoy has one 100-peso bill, two 200-peso bills, and five 500-peso bills in his wallet. He wants to randomly pick one bill. Let X be the random variable of choosing one bill from his wallet.

Questions:

1. Construct the probability distribution table of X. [2 points]
2. Compute for the mean of X, denoted as E(X). [2 points]
3. Interpret the mean of X. [1 point]
4. Compute for the variance of X, denoted as V(X). [5 points]
5. Compute for the standard deviation of X, denoted as SD(X). [2 points]
6. Interpret the standard deviation of X. [1 point]

Bonus [2 points]: What is the most difficult topic in this subject so far?