4. Why should a thread avoid requesting blocking I/O in a critical section in a uniprocessor system while interrupts are disabled? Recanse tha tyocesses uatrg anfua ueus wnfd contrae ait fr a VeY cht Hare Str VI. The Sleeping Barber Problem. A barbershop consists of a waiting room with n chairs, and the barber room containing the barber chair. If there are no customers to be served, the barber goes to sleep. If a customer enters the barbershop and all of the chairs are occupied, then the customer leaves the shop. If the barber is busy, but chairs in the waiting room are available, then the customer sits in one of the how to coordinate dinning philosopher problem (8 points). free chairs. If the barber is asleep, the customer wakes up the barber. Describe the barber and customers based on the producer-consumer, or reader-writer, or onit (empty) Wart Cful Customar on 4ueue /customer wake barb rnal (fl1) r barber atendt h custome