Develop a computer program or use a spreadsheet or equation solver to calculate the Diesel cold ASC thermal efficiency as the compression ratio (CR) ranges from 12.0 to 30.0 for the following cutoff ratios: 1.50, 2.00, 2.50, 3.00, and 3.50.
Plot these results (either manually or with a computer) with the thermal efficiency on the vertical axis and the compression ratio on the horizontal axis, using the cutoff ratio as a parameter for the family of curves. Utilize at least 25 points per curve.