A plant has two process hot stream (H and H) and two process cold streams (C and C). Heating and cooling utilities (HU and CU) are available for service. A minimum driving force of 10 F is required for any heat exchange duty. Table 3 provides the data for the process. Stream Flowrate x Specific Heat Btu/F.hr H H HU Stream Data for the Hot and Cold Streams of the HEN Problem C C CU 300,000 200,000 ? 400,000 600,000 ? Supply Temperature, F 600 400 600 540 390 90 Target Temperature, F 550 350 600 590 480 110 Using heat integration, what are the targets for minimum heating and cooling utilities? Please feel free to use any approach you prefer (graphical, algebraic, or optimization-based formulation).