Question 2 [15] Determine via Cascade method the pinch point temperatures for the following streams at Tmin=10C. Question 3 [20] Determine the heat exchanger network for the following streams at Tmin=10C. Question 4[10] You are expected to perform an economic analysis on a project who's projected cashflow for years 17 is R850000.00 with a fixed annual cost of R95000.00. The cash flow remains constant for the remaining 7 years (year 8-14), however, the operating cost balloons to an annual cost of R115000.00. If the invested amount is R2500000.00, determine: a) The net present value of the project after 14 years. b) Plot the net present value of the project and note how long it takes the project to break even