Give me a musical master piece on a website.
Tell me how to answer questions.

I don't know what you mean by the first sentence but to answer questions on you just click on the question you want to answer and press "add answer"

Explanation:

1. A popular musical masterpiece that I found on a website was merry had a little lamb which is played with these notes:

E-D-C-D-E-E-E-D-D-D-E-G-G-E-D-C-D-E-E-E-E-D-D-E-D-C

2. You answer questions by clicking add answer and then you will see a green "add your answer" button on the top of your screen and you click that to submit you answer.

Explanation:

1. I think that is what you meant for the first question you asked.

2. I literally just answered this question so I think I know how to answer questions.