What is the step by step procedure and required documents to open a demat account in Zerodha?

What is meant by Support and Resistance in Stock Market, and how it is useful for intraday trading?

Is there any authorized website to check the quarterly and half yearly reports of the company?

Is the brokerage and Security Transactional charges are mandatory even though I end up in loss?

What is the minimum amount of time that one has to invest to study the fundamentals of the company thoroughly?