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4. Calculate a net positive or negative AG value for the following conformational change. Show your calculations. CCH G Br OH Group kJ/mol kcal/mol Group kJ/mol kcal/mol C=N 0.8 0.19 NH 5.9 1.41 F 1.0 0.24 COOH 5.9 1.41 Br C=CH 1.7 0.41 CH=CH2 7.1 1.70 I 1.9 0.45 CH 7.28 1.74 OH Et HCC Cl 2.2 0.53 CH2CH3 7.3 1.75 Et Br 2.4 0.57 CH(CH3)2 9.0 2.15 OH 3.9 0.93 C(CH3)3 21.0 5.00