请用英文回答几个问题，谢谢！

Question (a): What is Information Technology?
Information Technology, the range that it contains completely is very broad , ranging from to, treatment or application arrives at the IT estate , the bank, consults about such as, the hospital, comes out , fabrication , movie and TV wait a minute , their common characteristic all is to be dependent on information and information system. The environment certainly has still had the network that computer soft hardware, does link as said or narrated above all things because the net sum is very other various being engaged in design , the upkeep , the personnel who holds out and manages has formed a omnipresent IT estate commonly.

Question (b): What is Information System?
Information System is that the data taking providing information service as major objective is intensive , the human-computer interaction computer applications is systematic.

Question (c): Why is it important to us?
To saying information