Please help me solve questions a,b &c

1. (20+5+5 Points) Southem Cans packages processed foods into cans for a variety of customers. The factory has four multipurpose cookers and canning lines that can pressure-cook, vacuum-pack, and applies labels to just about any type of food or size of can. The processing apparatus sets were purchased some years apart, and some of the cookers are faster and more efficient than others. Southern cans have four orders that need to be nun today for a particular customer: canned beans, canned peaches, conned tomatoes, and canned corn. The customer is operating under just-in-time operating system and needs the mixed order of canned food tomorrow. Southern. Cans has estimated the number of hours required to pressure-cook, process, and can each type of food by type of cooker as follows: Due to time constraints imposed by lengthy changeover procedures, only one job can be assigned to one cooker. a) How should the jobs be assigned to the cookers in order to process food more efficiently (i.e., in the least amount of time)? b) Due to energy supply restrictions, ONLY one machine can be operated at a given time. How much operating time is needed to process these orders? c) If all machines can be operated simultaneously and the processing must be done by 5:00pm today to ensure proper delivery, at what time the processing MUST start? (Assuming 8 hours per day working time excluding one-hour lunch and half an hour short breaks. The company practices fill-in break method for continuous uninterrupted production during work days.)