Salaam & Greeting

Q: Many a time we bump into non-Muslims, either at work, conferences, etc. and they tend to greet with good morning. Is one sinful if he replies to such a greeting by saying good morning back.

Q: I would like to please find out more on mu'aanaqah. Is it a sunnat? Will it be okay to conduct a lesson on it by including it under etiquettes? What is the method of performing it?

Q: My nani is bedridden. She has a female Christian attendant who comes everyday in the morning and leaves at night. She wanted to know if she can say salam to her when she comes in the morning. If not, then how should she greet her when she comes? Not saying anything appears rude and cold.

Q: Do we have to reply to someone who greets us by just saying 'salaams'?

Q:

1. Should I reply to the "assalamualaikum" written in an auto reply, because it's coming from the computer and is not verbally said? 

2. What is the ruling on typing "asak wr wb" and other similar short forms of salaam?

Q: If two people depart after meeting then saying salam is required or Allah Hafiz? 

Q: If a non-Muslim says Assalam u alAikum, how should we answer? 

Q: If a person is far away (so far away that he can not hear us) and we want to make salam to him. How should we do it? Should we say salam with the mouth and make a sign or just make a sign? How will this person reply to our salam? Will it be wajib to answer salam? Will he have to answer with the mouth only or by sign?

Q: To make Salam to others is sunnah. If a person does not ever make salam to others, is he a sinner? Can we blame him?

If a group of people come to another group and nobody in the group does Salam, will they be at fault?

Q: What to reply do I give if my non-Muslim friend says salaam to me?