Need complete, well defined answer with explanation and answers to all parts

Fixed \& Variable costs for four potential plant locations are shown below: a) Plot the total cost lines (units up to 12000 ) for these locations on a single graph. b) Identify the range of output for which each alternative is superior (i.e. has the lowest total cost) c) If expected output at the selected location is to be 8000 units per year, which location would provide the lowest total cost