1) Determine the coefficients and write down a first order response model for % yield. Ignore interactions between the factors. Plot response surface for % yield at a constant temp. of 90 C. Factor B Factor C Std A Response B 4 1 7 2 10 3 12 4 11 3 8 6 9 5 2 Run Block Factor A 19 15 5 6 7 8 9 Time, min Temp, C 1 Block 140.00 80.00 2.00 74 Block 140.00 90.00 3.00 66 Block 145.00 85.00 2.50 75 Block 145.00 85.00 2.50 83 Block 150.00 90.00 2.00 70 Block 145.00 85.00 2.50 76 Block 140.00 90.00 2.00 88 Block 150.00 90.00 3.00 97 Block 150.00 14 13 13 14 20 15 17 16 18 17 16 10 11 12 18 19 20 Response Conc. % Yield % Activity 53.2 Block 145.00 Block 140.00 Block 150.00 59.8 60.4 60.6 80.00 2.00 51 Block 253.41 85.00 2.50 79 Block 236.59 85.00 2.50 76 Block 245.00 85.00 2.50 91 Block 245.00 85.00 1.66 55 Block 245.00 85.00 3.34 81 Block 245.00 93.41 2.50 97 Block 245.00 85.00 2.50 80 Block 245.00 76.59 2.50 85 62.6 59.1 53.4 67.8 80.00 3.00 90 67.9 85.00 2.50 81 59.2 80.00 3.00 71 57.3 62.9 65.9 53.6 58.9 57.4 63.2 60.7 60.8 60.0