While a computer is run- ning, one memory module (out of the few memory modules on the system) blows up, and the computer hangs up. The user employs 'the computer science solution' i.e., switches the computer off, turns it on back again, and after a while, it boots up again. i. What is the main reason why the computer hung up? ii. When the computer came on again, how did the operating system know about how much main memory is there in the system? iii. The main time taken before it boots up again, is consumed in a file system check. Why is this needed?